A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

Pause in an abandoned hydroelectric station, now overrun with wildlife, to consider a thought-provoking poem.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

Europe's official "zero-level," the equator of elevation.

An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

This enormous spiral sculpture looks strangely out of place on the edge of a housing development.

The sophisticated hydraulic system of the Nazca civilization.

Double spiral staircases are not unheard of, but they are very rare.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

A popular 19th-century natural landmark is now hidden within a sprawling forest.

This Aztec structure remained hidden until the demolition of a supermarket exposed the lost temple.

Centuries later, the victims of Great Britain's greatest hysteria are finally being remembered.

This ordinary street was made infamous by a legendary visit from the devil.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A monument to the migrants who cross the dangerous waters between North Africa and a tiny Italian island.

A neighborhood park in the city of Cáceres hides what some believe are revolutionary examples of Neanderthal cave art.

This 7,000-year-old megalithic wonder covered by a Franco-era reservoir emerges in times of drought.

This grassy, tree-lined hill shares a name with the much-loved novel that it inspired.

This isolated island is often capped by its own fluffy cloud.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.