Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

Scattered throughout London are ancient remnants of the city's former bounding wall.

London's smallest police station is barely the size of a phone booth.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The remains of the great moral philosopher reside in a university in London.

A petite castle folly in the English countryside.

Three bridges straddle a stream, one stacked upon the other.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

Wallabies live naturally on this Irish island.

Seat of the Duke and Duchess of Devonshire for centuries.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

An optical Illusion once believed to be an electrical phenomenon.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The fairy tale castle of the "fairy-tale king."

An ethereal glowing blue ocean cave in Croatia.

A trash dump made beautiful by nature's power.

Dozens of padlock-trees along the Moscow River.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A battle between nature and architecture in the Cambodian jungle.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The largest stone moai on Rapa Nui.

A single tree's 2,800 aerial roots give the appearance of a complete forest.