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

This remarkably simple jail went over a century without an escape.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

After the devastating 2011 earthquake, historic Christchurch begins to recover, starting with the pop-up Re:START mall.

The glacier tucked within a New Zealand rainforest.

Catacombs turned marketplace.

A white Buddhist temple with a golden restroom.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

A man-made island in scenic San Francisco Bay.

A 90-acre park on former landfill that hosts an annual kite festival.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

The final resting place of the great navigator, or maybe his brother.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

A marvel of Byzantine engineering under the streets of Istanbul.

San Francisco's newly reopened hands-on science museum.

The world's most active stratovolcano is almost always erupting.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A complex of six forts embedded in the Rajasthan hills.

The hallucinogenic center of the ancient world.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.