A semi-scholarly approach to sex.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

A part of the world's largest marsh seems to be growing bright red Martian grass.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

Frozen in Norway, vended in Singapore.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

One of the most iconic sculptures in Caracas looks like a large orange ball suspended in the air.

Uppsala's adorable feline sign celebrates a popular children's book set in the Swedish city.

This charming candle shop has been in business since 1789.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Watch the seas clash at the place where according to Maori tradition, the spirits depart for their journey to the afterlife.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This giant statue of a vulva became internationally famous after an American exchange student got stuck in it.

This isolated island is often capped by its own fluffy cloud.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

A lush indoor jungle fills this bustling Madrid transportation hub.