Nearly 100 concrete graves lie hidden just beyond the pristine waters along the coast.

This home on a quiet suburban street is completely covered with vibrant mosaics.

This museum in a shuttered train station remembers the island's forgotten rail system.

The roadway bend where highway painters practice their craft looks like expressionist art.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Iceland's only steampunk shop imagines a retro-futuristic world that never was.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This amazing mountain temple is topped by one of the tallest sitting Buddha statues in the world.

This gnarled old tree supposedly sprouted from seeds kept in the pocket of a 16th-century Spanish sailor.

A former prison complex now displays a historic collection of inmate artwork.

This remote research station sits amid the second-largest ice sheet on the planet.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Trimmed trees grow alongside the graves like topiary tombstones.

Did Inca children also slide down these smooth rocky slopes above Cusco?

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

At 705 feet high, Brazil's "House of Stone" is the largest cave mouth in the world.

The bartenders at this crime-fighting theme cafe are actual private detectives by day.

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

The abandoned tuberculosis sanatorium is said to be one of the most haunted places in Canada.

These two giant boulders mysteriously perched on a 60-foot cliff may have been slung up there by a raging tsunami.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.