A spooky defunct railroad tunnel now part of a sprawling trail.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

Atop this former dutch railway office sits an interstellar work of art.

This hidden park hosts a rogue’s gallery of eccentric architectural obelisks.

This precariously perched fortress was once ruled by a crow-worshipping baron.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

Grand opera on a miniature scale.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

The abandoned coal loading dock is a canvas for unsanctioned art.

A crazy maze of a hostel, where every trap door and secret entrance brings you to a new wacky, wonderful room.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

The "birthplace of insulin," where Sir Frederick Banting realized the hormone could save the lives of Type 1 diabetics.

A quirky museum paying tribute to the history of the optical industry.

A sculpture park that takes the use of clay to a whole new level.

The sculpture of the deceased cockatoo flops atop its personal plinth.

The tiny, studious rodents greet visitors to the National Archives of Finland.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

A spectacular walk on the flank of a gorge.

The only pub in the world surrounded by an ancient stone circle.

The artwork is a community's ode to the "father of Irish tourism."

In the back of a bustling factory lurks a quiet museum honoring the history of Canadian sugar manufacturing.