A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

A shrine contains nearly 200 statues of the Buddhist deity Jizo, dressed in bibs by parents who have lost a child.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

An underground city of salt.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

A kaleidoscopic warehouse-maze of handmade neon signs.

A little sculpture with a large wardrobe.

A scattered trail of street art adds a pop of color to the city's stark structures.

A second generation sun-powered marvel lights up the night.

A black and white mural stands out from its psychedelic surroundings.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Apartment complexes built into huge repurposed natural gas tanks.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Iceland's tribute to its thankless civil servants.

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This beautiful, historic church looks like something out of a simpler past.

Europe’s most powerful hot spring supplies the surrounding region with hot water.