This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The world's most active stratovolcano is almost always erupting.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Thousands of well-dressed mummies below a monastery.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Every inch of this chapel is covered in craftsmanship from across the world.

A study of Fascist era Art Deco design in Italy.

An enormous, inside-out glass globe built in 1935.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

What once sat in the world’s spotlight is today a largely disused ghost complex.

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

Turntable anonymously received orphans, alms, and groceries.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The hallucinogenic center of the ancient world.