Religious dwelling in a Spanish volcano.

This giant Christ statue was a failed attempt by Indonesia to dissuade East Timor from demanding independence.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

One of Indonesia's tallest, this waterfall takes a 390-foot plunge into the Lake Toba caldera.

After a 2004 tsunami, this stranded boat was left in place.

A statue dedicated to the founders of communism.

The longest trolleybus route in the world, from Simferopol and Yalta.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.

Two cannon-like cranes were installed on top of the bank building to fend off bad feng shui.

An ancient knight and a symbol of the city's freedom.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

What happens when you cross a mayor and a painter?

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

The animals wander freely amid this gorgeous stretch of nature.

This Greek cinema was architecturally inspired by Mussolini's vision of a fascist Mediterranean utopia.

An abandoned Byzantine fortress and notorious prison.

A striking symbol of the Bulgarian capital.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

It houses the remains of a 17th-century version of the Titanic.

Old Danish castle immortalized in Shakespeare's Hamlet.

The western face was supposedly left clock-less to snub the Welsh.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.