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)

“A balancing rock, also called balanced rock or precarious boulder, is a naturally occurring geological formation featuring a large rock or boulder, sometimes of substantial size, resting on other rocks, bedrock or on glacial till. Some formations known by this name only appear to be balancing but are in fact firmly connected to a base rock by a pedestal or stem”. – Wikipedia

Photo: “The Brimham Rocks are balancing rock formations located on Brimham Moor in North Yorkshire, England. The rocks stand at a height of nearly 30 metres in an area owned by the National Trust which is part of the Nidderdale Area of Outstanding Natural Beauty”. – Wikipedia. (Photo by Tee Time Tony)

A waitress displays a plate of animal penises and testis at the Guolizhuang pen*s Restaurant on September 7, 2007 in Beijing, China. The restaurant offers more than 30 types of animal-pen*s dishes which can cost from 500 yuan (76.99 USD) up to 90,000 yuan (13,857.67 USD). It is believed that eating an animal's pen*s can strengthen a man's sexual ability. (Photo by Feng Li/Getty Images)

Located in Kunshan, eastern China, the restaurant relies on over a dozen machines for tasks such as greeting customers, waiting on tables and cooking basic meals. The eatery becomes the third café in the world to rely on the use of robot employees, potentially giving a glimpse into how future businesses could operate. Photo: This photo taken on August 13, 2014, shows a robot carrying food to customers in a restaurant in Kunshan. It's more teatime than Terminator – a restaurant in China is electrifying customers by using more than a dozen robots to cook and deliver food. (Photo by Johannes Eisele/AFP Photo)

This picture taken on September 9, 2014 shows a waiteress handing over food to customers at a prison themed restaurant in Tianjin. As more themed restaurants are popular in China, a “prison style” restaurent in Tianjin is aimed at reminding people to observe the law and to be good citizens. (Photo by Wang Zhao/AFP Photo)

Bikini-clad women sit as they operate a 3.6 metre-high custom-made female robot at the “Robot Restaurant” in Kabukicho, one of Tokyo's best known red light districts, August 15, 2012. (Photo by Tokyo Scum Brigade)

A milk custard bun made to resemble one of the popular Japanese “Kobitos” characters is squeezed during a display for the photographer at Dim Sum Icon restaurant in Hong Kong, China July 25, 2016. A dim sum restaurant in Hong Kong encourages diners to play with their food, and the result will either disgust or delight you. At Dim Sum Icon customers can squeeze a strange creature to poo or vomit on their plate before eating it. Hungry punters poke a hole into the mouth – or the rear – of the dim sum with a chopstick, squeeze it and watch the brown or white cream ooze out. The unique dim sums are made with a face to resemble Japanese Kobitos characters. (Photo by Bobby Yip/Reuters)

A fisherman is seen standing on a cliff edge at Cape Bank in La Perouse on February 20, 2011 in Sydney, Australia. The practice of fishing from rock platforms, cliffs and rocky outcrops is notoriously dangerous with many anglers per year being washed into the ocean by dangerous surf or unexpected large waves. Angling is often reported as the sport having the highest mortality rate on average due to fishermen drowning with rocking fishing contributing to a high number of these deaths. (Photo by Mark Kolbe/Getty Images)