An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A musical instrument played by the sea.

Where the lovelorn find a home for their sentimental keepsakes.

Ride a dragon train into a world of dwarves.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Handsomely crafted representations of our round planet.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A beautiful maze marks where three countries meet.

Museum covers every step of the chocolate-making process, from cultivation to the finished product.

An ancient Egyptian temple in the middle of Madrid, Spain.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.