In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

Colombia's first concrete structure doubles as a replica of Versaille's Petit Trianon Belvedere and a symbol for development.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Come for the flowers, stay for the bats!

Handcrafted thermal spa washes away each night with the tide.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Tubing through a cave lit with glowworms is a magical underground experience.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A battle between nature and architecture in the Cambodian jungle.

Buried in the Laos jungle is a sanctuary for bears that would have otherwise been milked to death by poachers.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

Hindu temple of the dead home to hundreds of long-tailed macaques.