A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

Illegal drag racing two stories beneath Chicago’s streets.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

A monument to the art of slicing people open.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

San Francisco's newly reopened hands-on science museum.

A museum befitting the city responsible for supplying the majority of the world's LSD.

The only theatre in the world constructed specifically for sound movement.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

San Francisco Bay's ghost town.

Here, visitors can swing with the waves of the Pacific Ocean.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Its buzzing collection honors vibrator history.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

Medical museum focused on antique anesthesiology equipment.

These abandoned grain silos and tunnels are an urban exploration dream.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

A fascist-era rural village abandoned since the early 1980s.