Rent out a glass igloo to watch the Northern Lights like you live in the future.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Old Danish castle immortalized in Shakespeare's Hamlet.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

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

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

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

Giant marble phalluses on the sacred island of antiquity.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

The hallucinogenic center of the ancient world.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

This anatomical sculpture raises awareness about violence against women and promotes gender equality.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This ancient theater was once the home of fierce gladiatorial battles.

The world's largest reflecting pool is just two centimeters deep.