Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

Rare recess caves fill this unbelievably beautiful Ohio park.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A hands-off space for graffiti artists to hone and display their skills.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

A Jenga-style cylindrical tower of books that appears to go on forever.

A whimsical village of unique treehouses resides in a Washington forest.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

These eerie outliers of the lightning bug family glow a mysterious blue color.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Tokyo’s only Vaudeville-cuckoo clock–steampunk-Victorian curio cabinet time piece.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

An acoustic anomaly with a mysterious cause.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Macabre astrological automaton clock dating to the late 1400s.