The historic tower houses of this nearly abandoned Greek town have been compared to the spikes on an iguana's back.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

An ancient octagonal weather station named for the eight Greek gods of wind.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

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

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Giant marble phalluses on the sacred island of antiquity.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

A towering baroque basilica jutting out of the French countryside.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.