The oldest residential street in Europe also features an optical illusion.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A hidden subterranean installation offers a view of the sky.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

This magnificent, quirky home sits atop a literal gold mine in the middle of the Nevada desert.

Seattle's own bad art museum located inside Cafe Racer.

What's that on the side of that building? Va Va Voom, it's Bettie!

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Norway has built what may be the world's most beautiful public toilet.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

An ice cream parlor chain that caters to vegans and pinball fans equally.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

A tongue-in-cheek arcade where the games are based on everyday life.

An architect transformed this abandoned cement factory into his castle-like workshop.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A modern day curiosity cabinet.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

A Hawaiian stairway to heaven—that you can't climb.

Medicinal spa created with the discharge from a geothermal energy plant.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.