These photographs appear to show a spectacular underwater world making it ideal for scuba divers – in central Europe. Twelve metres of water covers trees, footpaths, benches and bridges that are usually accessible throughout the year. Visitors to the Green Lake in Tragoess, Austria, that is normally only one metre deep, can leisurely stroll around the picturesque lagoon. Photo: A diver crossing a bridge in the flood water. (Photo by Solnet/The Grosby Group)

Jellyfish Lake (Palauan: Ongeim'l Tketau, “Fifth Lake”) is a marine lake located on Eil Malk island in Palau. Eil Malk is part of the Rock Islands, a group of small, rocky, mostly uninhabited islands in Palau's Southern Lagoon, between Koror and Peleliu. There are about 70 other marine lakes located throughout the Rock Islands. Jellyfish Lake is one of Palau's most famous dive (snorkeling only) sites. It is notable for the millions of golden jellyfish which migrate horizontally across the lake daily.

A mongoose growls at a startled lion on September 10, 2011 in Maasai Mara, Kenya. Four lions were left with their tails between their legs when a mongoose bravely took on the predators. Despite being under two feet tall, the aggressive mongoose growled at the felines and even bit one on the nose. The shocking fight, which was photographed in 2011 but has just been released, began in the Masaai Mara National Park, Kenya, when photographer Jerome Guillaumot came across four young lions surrounding the terrified marsh mongoose. The lions chased the mongoose into a hole in the ground but the small animal reemerged to fight the predators once again before running for cover. (Photo by Jerome Guillaumot/Barcroft Media)

A devotee of the Hare Krishna faith poses for a photograph during the festival of Rathayatra on June 12, 2011 in London, England. Rathayatra, or Chariot festival, features three huge, wooden chariots pulled by hand across Central London accompanied by constant singing, chanting, drums, cymbals and dancing. (Photo by Matthew Lloyd/Getty Images)

A mahout (elephant driver) walks a baby elephant across the city streets at night September 27, 2008 in Bangkok, Thailand. (Photo Paula Bronstein/Getty Images)

Few people haven’t heard about the ancient city of Persepolis, which lies at the foot of the Mountain of Mercy (Kuh-I-Rahmat). In ancient times, Persepolis was the capital of the Achaemenid Empire. Regretfully, it was burned by the Greeks in 330 BC after they looted the immense treasure of this city. It is said that Greeks needed 5,000 camels and 20,000 mules to carry all the treasures from Persepolis. The only thing of Persepolis that has survived the wear of time is the ginormous stone terrace 530 by 330 meters adorned by elaborate stone sculptures. It is amazing how intricately detailed some of the sculptures are, despite the fact that they were created many centuries ago.