Haunted tuberculosis hospital built by the patients.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

The world's largest wooden structure.

An eerie collection of the surviving structures from a past celebration of the future.

The oldest Roman lighthouse still in use.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A decommissioned submarine base makes a great space for graffiti art.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Mysterious craters may have been home to an ancient cult.

Spend the night in 1920s Latvia in this historic recreation and movie set.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Open-air museum with a large collection of Soviet-era statues.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

This micro-nation may be some sort of prank, but its constitution sure seems official.

A memorial to the murdered Jews of Kaunas.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

The monument honors the mountaineers who were part of Europe’s best anti-Nazi forces.