The celebrated eyesore created by starry-eyed sweethearts.

The Guardian of Tallinn.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

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

The world's largest wooden structure.

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

The corpse bride of Portugal.

A unique seaside cave where Aleister Crowley faked his own death.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This abandoned five-star hotel is now a five-star urban exploration destination.