This ancient market is often referred to as the oldest shopping mall in the world.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

These fantastically named natural pools look like something out of a Scottish myth.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The house in the middle of the motorway.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

A Roman temple perched over an Italian town, forgotten several times over.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

A beautiful geyser under environmental threat.

The reconstruction of this prominent building fulfilled a long-written command.

A mysterious shape catches the eye in this 16th-century painting.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

Eyam took steps to quarantine themselves and keep the plague from spreading.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The oldest continuously operating pharmacy in Europe.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.