This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The world's spiciest ice cream comes from Glasgow.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

A once extravagant mansion, now reduced to ruin.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

A former reservoir that was only recently discovered after more than 60 years of disuse.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

An abandoned observatory in the middle of the Illinois prairie.

This Roman underground canal was the longest tunnel ever built until the late 19th-century.

In the middle of a busy residential neighborhood, a small roofless church being reclaimed by nature.

A fiery crater has been burning in the Karakum Desert since 1971.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

Countless grotesque faces stare out from this eerie Prague art wall.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

A small house sits between two huge rocks, with its back to the sea.

The only thing sweeter than the potatoes is the canine proprietor of this roadside stall.

These mysterious ruins are hidden amid this sleepy coastal city.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.