The hallucinogenic center of the ancient world.

Built by the Ancient Greeks, this chariot bridge is still in use today.

The only known mosaic depicting the Greek god of sleep, Hypnos.

A tiny church on a man-made island in the Adriatic.

The hairpin turns in this mountain road take the shape of a letter—is it a coincidence or a symbol of love?

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

Legend says this sacred tree was a gift from goddess Athena.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

The kitsch mansion of the former Romanian president Nicolae Ceaușescu features a golden bathroom.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.