Napoleon's invasion of Spain led to the forced abdication of two Spanish monarchs and the installment of one of his brothers as king, which in turn galvanized a nascent movement for independence led by the likes of Simon Bolivar, José de San Martin and others ultimately resulting in all of mainland Latin America slipping away from Spanish control. The Portuguese royal family relocated to Brazil, causing that country to eventually declare independence from the mother country as the Empire of Brazil while ruled by a different branch of the same royal/imperial family. On his way through Europe, Napoleon smashed the Holy Roman Empire and ended the independence of the Republic of Venice, he ended centuries of feudal privilege and obligation and spread Jewish emancipation as well as Civil Law that treated everybody (mostly) equally. The Code Napoleon is still the basis for law in Louisiana and (via the German BGB) Japan as well as numerous other countries (see history of justice). Resistance against Napoleon soon made use of the "levee en masse" tactic of revolutionary France and galvanized for the first time a sense of nationalism. The Napoleonic Wars in a sense laid the groundwork for both the (bourgeois-nationalistic) revolutions of 1848 and the post World War I world with nation states emerging out of the ashes of multinational empires like the Russian Empire or Austria-Hungary.

The image and perception of Napoleon and his adversaries have undergone and continue to undergo reappraisals over the centuries. In Poland Napoleon is often regarded as a hero, and even mentioned in the national anthem, whereas many in Tyrol idolize the anti-Napoleon fighter Andreas Hofer despite his often anti-science, anti-civil rights and downright reactionary stances. Napoleon sold the Louisiana purchase to the United States, giving them huge territories which were charted by the Lewis and Clark expedition and became the Old West, where the expansion of slavery led up to the American Civil War; he elevated Saxony and Bavaria to kingdoms, giving the latter the territory of Franconia to the enduring chagrin of locals two hundred years later. The desire to emulate his uncle led Napoleon III of France into ill-advised military adventures in Italy (helping that country to become unified under Victor Emanuel II, the first "King of Italy" since Napoleon I), Mexico (giving us "Cinco de Mayo") and against Prussia, leading to the loss of Alsace which would be one of the main gripes driving France to hostility towards Germany and into World War I.

• 48.20816.3731 Vienna. The Emperor of Austria was one of Napoleon's arch-enemies, and eventually defeated his armies. After the war, the 1814–1815 Congress of Vienna set the new European borders. Artifacts from the Napoleonic wars are displayed in the Museum of Military History (Heeresgeschichtliches Museum). 

• 54.325828.36052 Barysaŭ. Site of the Battle of Berezina during the French retreat from Russia. The French and their allies suffered massive casualties during the crossing of the river. Bérézina has entered French common parlance as a synonym for "disaster". The battle is sometimes reenacted during local festivals. (updated Dec 2019)

• 50.71674.38333 Waterloo. Where Napoleon was finally defeated, now a universal symbol for defeat, not least due to the ABBA song. 

• 49.154816.87424 Slavkov u Brna (20 km east of Brno). Site of the Battle of Austerlitz, a decisive French victory over Austria in 1805. An armistice between France and Austria was signed at the Baroque Slavkov Castle. 

Napoleon himself is buried in Paris/7th arrondissement in the Dôme des Invalides. There is a great Army Museum (Musée de l'Armée) next door that was founded in 1795 and expanded by Napoleon, but the current building dates from 1905. The 48.86752.3294441 Vendôme Column, centerpiece of Place Vendôme, raised to commemorate the victory at Austerlitz, 48.872.3241672 La Madeleine church, originally commissioned as the Temple de la Gloire de la Grande Armée ("Temple to the Glory of the Great Army"), and the 48.87382.2953 Arc de Triomphe are very significant monuments in this context, and should not be missed.

• 48.855952.31274 Hôtel des Invalides, 6, boul des Invalides ( Invalides). Founded in 1671 by Louis XIV as a hospital for 6,000 wounded soldiers—this function explaining the name of the building—the golden-domed Hôtel des Invalides still functions as an infirmary and now also houses the Musée de l'Armée. The church attached, l'Eglise du Dôme, houses the tomb of Napoleon.  
• 41.9179568.7387465 Napoleon's house, Ajaccio. Napoleon was famously born on Corsica (though the claim that he was born before France took control of the island is the same British propaganda that also caused the persistent rumor of him being unusually short). His home from birth has been turned into a museum  
• 48.4022222.7005566 Palace of Fontainebleau (Château de Fontainebleau). Houses a Napoleon museum. (updated Feb 2022)

• There is a rather bombastic 51.31222212.4130565 Monument of the Battle of Nations (Völkerschlachtdenkmal in German) in Leipzig. Standing 91 metres tall, it is the biggest monument in Europe. It was erected in time for the first centennial (1913). Despite the nationalistic spirit prevalent at that time (one year before the beginning of World War I), the monument does not glorify war, but laments the lives lost: The giant soldier statues have a sad and weary expression rather than a heroic one, and the water pond in front of the monument is called "lake of tears". Adepts will find numerous Masonic symbols as the architect was a Freemason.

• The Quadriga statue on top of the 52.5162713.377726 Brandenburg Gate in Berlin, designed as a symbol of peace, was taken to Paris by Napoleon as war loot after conquering Prussia in 1806. It was returned to Berlin after Napoleon's defeat in 1814, which is the reason for its Berolinian nickname Retourkutsche (literally "return carriage" but figuratively meaning "retort"). The Iron Cross, decoration awarded of the German freedom fighters, and the Prussian Eagle were added to the Victoria figure, making the ensemble a monument to the victory over Napoleon. The 52.48766113.3814647 National Monument for the Liberation Wars on the Kreuzberg hill in Berlin, designed by Karl Friedrich Schinkel, is another Prussian memorial to this series of wars.

• There is a 46-metre high 52.36679.72758 Waterloo column in Hanover, erected in 1825–1832 to commemorate the Allied victory over Napoleon. Hanover was ruled in personal union by the British monarchs until its occupation by the French army in 1803, leading to its annexation to the French puppet state "Kingdom of Westphalia". In 1814, the Kingdom of Hanover was restored, again ruled by the British monarchs until 1837. Thus, troops from Hanover fought in Wellington's army.

• 50.949611.57339 Napoleon memorial stone near Jena at the site of the Battle of Jena–Auerstedt in 1806, a decisive French victory over Prussia. Military-historical reenactments take place at the site from time to time.

• The 48.91833311.86055610 Hall of Liberation in Kelheim near Regensburg was dedicated by Bavarian king Ludwig I to commemorate the victory of German freedom fighters against Napoleon.

• 50.0830567.76583311 Pfalzgrafenstein Castle near Kaub sits picturesquely on an islet in the middle of the Rhine. This is the place where the Prussian army under Blücher with 60,000 men and 20,000 horses crossed the river in January 1814 during their pursuit of Napoleon's retreating army. From there, they started the reconquest of German territories west of the Rhine that had been part of the French Empire for nearly 20 years. There is also a monument and museum dedicated to Blücher.

• In 1793, the short-lived Republic of Mainz was a "sister republic" of revolutionary France and the first republic in Germany. It was later annexed by France. The 50.005288.2716712 Deutschhaus , former commandry of the Teutonic Knights, was the seat of parliament of the Mainz Republic, later served as a residence of Napoleon, and is now the parliament of the state of Rhineland-Palatinate.

The British posed by far the largest obstacle to Napoleon's bid for world domination, and were responsible for handing him arguably his two most significant defeats. The Battle of Trafalgar (1805) and Battle of Waterloo (1815) continue to be major sources of British national pride, and the commanders of those battles, Admiral Horatio Nelson (who was killed in action at the battle) and Arthur Wellesley, Duke of Wellington respectively are regarded as national heroes, and among the very few non-monarchs to have been granted British state funerals. There are three major sites in London connected to Nelson and Wellington:

• 51.508056-0.12805613 Trafalgar Square is named for the naval Battle of Trafalgar off the coast of Spain. Its main landmark is the 169-ft (52 m) Nelson's Column, atop which the admiral looks down Whitehall towards the Palace of Westminster.
• On 51.5025-0.150814 Hyde Park Corner stands the London residence of the Dukes of Wellington, part of which has been converted into a museum of the 1st duke's life, who is also commemorated on the Corner by a statue and a neoclassical arch.
• 51.513839-0.09835115 St Paul's Cathedral, London's main Anglican cathedral, is the burial site of Nelson and Wellington.

South west of the capital, the county of Hampshire has several connections to the Wars and its players:

• The 50.801-1.1116 Historic Dockyards in Portsmouth keep a number of the Royal Navy's famous old vessels, including Nelson's command ship HMS Victory, where you can visit the spot he died.
• 50.837415-1.11490617 Portchester Castle, 5 miles (8.0 km) north of Portsmouth, is best known as a Roman and Medieval castle, but was later used as a gaol for more than 7,000 French prisoners of war.
• 51.3491-0.996318 Stratfield Saye House, on the road between Basingstoke (8 mi) and Reading (10 mi), is the Wellingtons' country pad, where you can get a guided tour of the stately home and a small museum, before exploring the estate by yourself and visiting Copenhagen's grave.
• The country's largest monument to the Iron Duke, an 51.2533-0.779919 Equestrian Statue of the Duke of Wellington, was originally unveiled at Hyde Park Corner, but was widely disliked for its ostentatious size and was moved out of the capital to the garrison town of Aldershot once the duke was safely dead.

• 42.761810.240820 Elba. Napoleon was exiled here in 1814, but escaped to take power in France once more after the first Bourbon Restoration ran into problems with its low popularity and the former enemies of France seemed to be letting their guard down 

• 39.100503-9.26575321 Linhas de Torres Vedras (Lines of Torres Vedras). A chain of 152 forts and other defenses built north of Lisbon to defend the capital from Napoleon's armies. (updated Aug 2021)

• 55.520835.820822 Borodino battlefield and museum, Mozhaysk district (30 km northwest of Vereya). Site of the Battle of Borodino during Napoleon's invasion of Russia in 1812, resulting in some 70,000 dead soldiers on both sides and Napoleon's temporary capture of Moscow.  

One of the several peace treaties during the Napoleonic Wars was signed in Bratislava which is still commemorated at the site of its signing.

• 36.183333-6.03333323 Cabo de Trafalgar (Cadiz province). Cape which lends its name to the famed Battle of Trafalgar in 1805, the saw the British navy score a decisive victory against the combined French and Spanish navies, thus scuttling Napoleon's plans to dominate the seas, and cementing the United Kingdom's place as the world's dominant naval power for the rest of the 19th century, and much of the first half of the 20th century up to World War II.  
• 40.41755-3.6927324 Museo Naval de Madrid (Naval Museum of Madrid), Paseo del Prado, 5 (Banco de España ), ☏ +34 915 238 516, ohculturanaval@fn.mde.es. Sep- Jul: Tu-Su 10:00-19:00; Aug: Tu-Su 10:00-15:00. An excellent museum featuring the Battle of Trafalgar. €3 (requested donation). (updated Jan 2017)

Napoleon was famously banished to Saint Helena after Elba proved too close to mainland Europe. Rumors of his poisoning by the British are long-lived though probably unjustified.

• -15.950222-5.6830227 Longwood House. Site of Napoleon's final exile and a museum. (updated Feb 2022)