These ancient giraffes are the largest known animal petroglyphs in the world.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

You can row a boat through this ancient underground reservoir.

Apartment complexes built into huge repurposed natural gas tanks.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This Parisian café sticks almost exclusively to an ethos of reuse.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

This legendary urban waterfall creates a dazzling display of rainbows.

The platform atop this verdant volcano was built with the help of a royal elephant.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Rainbow-hued in the summer and crystalline in the winter, this salty lake has inspired battles, temples, and plenty of awe.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

A futuristic climate change study is nestled deep within this public land.

This "cursed house" features secret rooms, hidden vaults, and dark escape tunnels.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A ruined Maya city that suffered a years-long case of mistaken identity.

Many of the murals covering this sleepy Florida town hide some sort of intentional error.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.