The home of president Truman during the Potsdam Conference, and the place from which the atomic bomb strike on Japan was triggered.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A town that sets itself apart with supersized designer seating.

A journey through every aspect of the human body.

A futuristic rocket marks the spot where three borders meet.

The world's largest collection of fire-fighting items dating back almost 350 years.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

One of the world's largest collections of pharmaceutical artifacts.

This artistic fountain display pays homage to this area's theatrical history.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

A local train station entrance hall doubles as a sanctuary for barn swallows.

The cutest way to stay safe in traffic.

A solid steel plane designed to catch fire over and over again.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

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

A uniquely preserved neo-Gothic church that is now home to a collection of art and woodcarvings.

The grave of the famous painter is marked by a simple stone in the ground.

A helicopter memorial commemorating what was once the only way to access this West Berlin exclave.

A space-grade telescope mirror lies discarded in the shrubs.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This spectrum of a star was observed by one of the world's most accurate spectrographs. 

A historical observatory still in use by modern astronomers.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

These 250-year-old wagon tracks are a lasting sign of Dutch migrants crossing the mountains.