A spitting ode to a German serial killer.

Commonly acknowledged as the only public monument to the Devil himself.

A lush indoor jungle fills this bustling Madrid transportation hub.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

These bamboo and rope bridges cross the Nam Khan River for six months every year.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

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

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

A small 12th-century temple surrounded by waters believed to have curative properties.

A battle between nature and architecture in the Cambodian jungle.

Buddha shrines hide within dark tunnels at this unique forest temple.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

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

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The commemorative stone column conceals a secret laboratory.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

A little slice of Japan and its aesthetics in London's Holland Park.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.