A seller dressed as Snegurochka (The Snow Maiden) shows Christmas toys at the Christmas decorations set in the Moscow GUM State Department store in Moscow, Russia in Moscow, Russia, Monday, December 16, 2019. (Photo by Pavel Golovkin/AP Photo)

A tourist stands on the shore of a private beach in Naama Bay, Sharm el-Sheikh, south Sinai, Egypt, Sunday, November 8, 2015. Britain's foreign secretary says airport security in many cities will need to be overhauled if it is confirmed the Russian plane crash in the Sinai was caused by a bomb planted by the Islamic State group or someone inspired by the militants. (Photo by Vinciane Jacquet/AP Photo)

Two men try to load their just purchased Samsung 55" TV into a car, at a Best Buy store in Fairfax, Virginia on November 26, 2015, on a Black Friday sale that started a day earlier during Thanksgiving evening. The US holiday shopping season kicks off with "Black Friday" – the day after the Thanksgiving holiday – with a frenzy expected at stores around the country as retailers slash prices. (Photo by Paul J. Richards/AFP Photo)

Libyan rebel fighters protect a pro-Gaddafi loyalist fighter from angry onlookers as he is brought in for medical attention to the Tripoli Central Hospital on August 25, 2011 in Tripoli, Libya. Heavy fighting continues in the Libyan capital between Gaddafi's forces and the surging rebel presence. Rebels, who have issued a $1.7m reward for Gaddafi's capture “dead or alive”, are attempting to reach Colonel Gaddafi's hometown of Sirte but have met loyalist resistance. (Photo by Daniel Berehulak/Getty Images)

A guard dog in the suburbs of Yakutsk, Russia, considered to be the coldest city in the world, January 2014. (Photo by Amos Chapple/REX Features)

These photographs are the work of urban explorer Dr Bradley Garrett who made headlines back in 2012 when he posted a series of snaps from the top of The Shard skyscraper while it was still under construction. Garrett, now a researcher at the University of Oxford, took these shots during his time with the London Consolidation Crew (LCC), a loose collection of urban explorers based in the English capital. Photo: Bradley Garrett stands on the edge of the Ritz-Carlton Chicago as lightning strikes in the distance in Chicago, US. (Photo by Bradley L. Garrett/Barcroft Media)

A house built on a rock on the river Drina is seen near the western Serbian town of Bajina Basta, about 160km (99 miles) from the capital Belgrade May 22, 2013. The house was built in 1968 by a group of young men who decided that the rock on the river was an ideal place for a tiny shelter, according to the house's co-owner, who was among those involved in its construction. (Photo by Marko Djurica/Reuters)