These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

This striking sculpture of Icarus honors Greece's fallen flyers.

The secular incarnation of a religious meditation.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

The beautiful baroque library of the Hapsburg empire.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This museum promotes informed contraception by documenting its often secret past.

This cubist Vienna church building looks like some sort of alien stonehenge.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Iceland's only steampunk shop imagines a retro-futuristic world that never was.

This excellent museum recreates the boom days of the herring rush in the "Atlantic Klondike."

Along this wire fence, travelers have been leaving a particular memento since 2012.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

This museum dedicated to divination also honors a local 10th-century prophetess.

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

This black church sits alone among a field of lava rock.

This tiny museum's sizable collection is jammed into a former underground public toilet.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

An encyclopedic collection of mammal penises.