The building features one of the last remaining free-floating spiral grand staircases in the U.S.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

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.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

These enlarged egg sculptures represent the native birds of eastern Iceland.

This stunning concert hall has become a symbol of Iceland's national recovery.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Three columns of volcanic rock shoot out of the ocean.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This elegant arc of a waterfall marks a religious turning point.

The most powerful waterfall in all of Europe.

An encyclopedic collection of mammal penises.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Walk in the footsteps of the gods and straddle two tectonic plates.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

This Kyoto Starbucks takes coffee drinkers back in time.

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

A steaming, boiling hellscape sources Hokkaido's thermal baths.

The 10,000 Torii shrine.

This 700-year-old street food market features baby octopus and soy donuts.