The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.

Art and a pun, all in one.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

High winds can make this one scary landing.

The glacier tucked within a New Zealand rainforest.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

Come for the flowers, stay for the bats!

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

One of the biggest markets in Asia, under one of the continent's largest domes.

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.

Many Hindus make the long pilgrimage to this holy city to have their remains burned on the banks of the Ganges River.

A once-stately trading fort is now a ruin slowly being consumed by the sea.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

A complex of six forts embedded in the Rajasthan hills.

The world's second-largest sundial, made entirely out of stone.

The largest known Ancient Egyptian obelisk.