When the tide is high, you can see the Atlantic pushing up through a deep, jagged hole in the rock.

A little-known, but surprisingly large waterfall on the Little Truckee River in the northern Sierra Nevada.

Unbeknownst to many, an ancient burial mound hides in plain sight in Ueno Park.

An ancient cemetery hides behind a line of disparate chapels.

A non-stop elevator ride in Vienna's city hall.

This 18-foot-tall public art installation is another of sculptor Thomas Dambo's trolls.

This Art Nouveau mansion was used as the "House of the Screaming Child" in Dario Argento’s giallo classic.

Some of the last remaining relics of one of World War II's most important invasions.

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.

An enormous factory from the late 1800s sits abandoned on Cleveland eastside.

This demonic monument commemorates a carving destroyed in World War II.

The spectacular geological formations make it one of the most impressive caves in Europe.

Visit a remnant California's Gold Rush, which locals claim is haunted by spirits from the past.

A phantasmagoric tomb honors a Belgian artist-scientist's contributions to the world of spooky entertainment.

A former millstone quarry in the Italian Alps is strewn with rocks bearing distinct round shapes.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

This sound-art installation features songs composed using only the Mid-Hudson Bridge as an instrument.

Unchanged for decades, World War II-era bullet holes and nostalgic ghost signs still haunt this desolate train station.

A portrayal of two lamps embraced and in love.

Louisiana's tallest waterfall is only a short hike away from the middle of nowhere.

This prehistoric karst cave is situated near a working ranch and historic warm springs.

This fortress-like monastery is covered with intricate frescoes.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

The ruins of this once-grand mansion are linked to one of the country’s most popular clothing brands.