Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

The angel of death appears to weep black tears at this grave marker.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

There are owls with glowing eyes in Herald Square.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A working metal shop and venue for outrageous art and music shows in a former cannonball factory.

Exact replica of the ancient monument, but much, much lighter.

A sculptor's dream castle turned fantastical ruin.