Template:Potd/2018-07

English : Mud flow at Berca Mud Volcanoes, a geological and botanical reservation located close to Berca, Buzău County, Romania. The phenomenon is caused by gases that flow from 3,000 metres (9,800 ft) deep towards the surface, through the underground layers of clay and water. They push up underground salty water and mud, until they overflow through the mouths of the volcanoes, where the gas emerges as bubbles. The blur in the middle of the channel is caused by a wave of mud that passes approx. every 20 seconds.

English : West Indian whistling duck (Dendrocygna arborea) on Grand Cayman, to celebrate Constitution Day in the Cayman Islands

English : Most summers, jewel-toned hues appear in the Black Sea. The turquoise swirls are not the brushstrokes of a painting; they indicate the presence of phytoplankton, which trace the flow of water currents and eddies.

English : A female four-spotted chaser (Libellula quadrimaculata). Alaskan schoolchildren voted this insect, known as the four-spotted skimmer, official State insect in 1995. Like all US States, Alaska celebrates Independence Day on July 4.

English : Old Jewish Cemetery (in Czech Starý židovský hřbitov) in Josefov in Prague, Czech Republic

English : View of Oka/Volga confluence and Church of Alexander Nevsky in Nizhny Novgorod, Russia.

English : Konzerthaus Berlin, a concert hall located on the Gendarmenmarkt square, center of Berlin, Germany. The Neoclassical building is one of the major works of the architect Karl Friedrich Schinkel whereas the sculptures in the exterior are work of Christian Friedrich Tieck and Balthasar Jacob Rathgeber. Inaugurated in 1821 as the Royal Playhouse, it became from 1919 to 1945 the Prussian State Theatre. Due to severe damages by the Allied bombing and the Battle of Berlin it was rebuilt from 1977 until it was reopened in 1984. The building houses the Konzerthausorchester Berlin.

English : Ceiling of the Historical Court Bower, Lübeck, Schleswig-Holstein, Germany

English : Passiflora incarnata, Passion Vine, at Norfolk Botanical Garden.

English : Lycidae with a mite. It is most likely a larva, but there's also a small chance it could be a larviform female.

English : A Lockheed Martin F-22A Raptor fighter streaks by at the 2008 Joint Services Open House (JSOH) airshow at Joint Base Andrews, Maryland

English : Sony Alpha A77 with 16-50mm f/2.8 SSM lens.

English : Arches in the interior of the church of Holy Mother of God Narthex within the Sanahin Monastery complex, Lori Province, Armenia. Sanahin literally translates from Armenian as "this one is older than that one", presumably representing a claim to having an older monastery than the neighbouring Haghpat Monastery. The Armenian Apostolic monastery was built in the 10th century in Armenian style and has become a tourist magnet.

English : Goalie Brice Samba and an incoming ball at the 2013 Valais Cup

English : Lilium kesselringianum in Caucasian Biosphere Reserve in Sochi, Russia.

English : Mute swans (Cygnus olor) and their cygnets in Oxfordshire. Today sees the first day of Royal Swan Upping on the River Thames when swans are ringed. Ownership of swans in the Thames is shared by The Crown, the Vintners' Company and the Dyers' Company.

English : Two SBB RABDe 500 "ICN" tilting trains on the Jura foot railway line, at Twann, with Lake Biel in the back

English : Panoramic view of the Mezcala Bridge on Highway 95 in Mexico

English : The Temple of Garni (lit. "pagan temple of Garni") is a classical Hellenistic temple in Garni, Armenia. It is perhaps the best-known structure and symbol of pre-Christian Armenia and was probably built by king Tiridates I in the first century AD as a temple to the sun god Mihr. According to some scholars it was not a temple but a tomb and thus survived the universal destruction of pagan structures. It collapsed in a 1679 earthquake and reconstructed between 1969 and 1975.

English : The hydroplane boat, Ellstrom Elam Plus, at the 2006 Madison Regatta

English : Heteropoda venatoria, Giant crab spider, is a species of spider in the family Sparassidae, the huntsman spiders.

English : A noontime rest for a full-fledged assembly worker at the Long Beach, Calif. plant of Douglas Aircraft Company

English : Panorama of the Winter Palace in Saint Petersburg, Russia.

English : Cast of a sitting victim of the eruption of Mount Vesuvius, 79 CE, Pompeii, Italy.

English : Interior courtyard of the Tabātabāei House, a historic house in Kashan, Iran. The house was built in the early 1880s by Ustad Ali Maryam, architect of the Borujerdis House and has 40 rooms, 4 courtyards, 4 basements and 3 windwards spread over a surface of almost 5,000 square metres (54,000 sq ft).

English : Eucomatocera vittata is a species of beetle in the family Cerambycidae, Longhorn beetle. Its a stemborer; here it is enjoying the sap of Pueraria phaseoloides.

English : DTM car Mercedes-Benz Season 2009 (C-Class, W204), Mathias Lauda (driver)

English : The star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 that extends one degree on the sky in the direction of the Scorpius constellation. Part of the nebula is ionised by the youngest (bluest) heavy stars in Pismis 24. The intense ultraviolet radiation from the blazing stars heats the gas surrounding the cluster and creates a bubble in NGC 6357. The presence of these surrounding gas clouds makes probing into the region even harder.

English : Frescoed ceiling of the 17th-century Church of Debre Berhan Selassie in Gondar, Ethiopia.

English : Male African buffalo (Syncerus caffer) with a red-billed oxpecker (Buphagus erythrorhynchus) in South Africa. The buffalo doesn't mind the bird too much as it eats ticks and other insects that bother him. 30 July is the United Nations’ International Day of Friendship.

English : A Kamchatka Brown Bear near Dvuhyurtochnoe, Kamchatka Peninsula, Russia.