This elaborate towering structure was once famed for its revolutionary height.

Southern Italy's spinning top village.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

A surrealist timepiece by the artist of melting clocks.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

This 19th-century fountain's namesake animal isn't what you think it is.

Giant topiary dog once played a role in a terrorist bomb plot.

Two large posteriors in one giant statue.

The much-loved protagonist of famed Argentinian comics can be found sitting on a park bench.

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

A historic Christian shrine nestled within a spectacular natural cave.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

This one has sailed five times as far as Sir Francis Drake's famous ship.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

An archway adorned with vulnerable flora and fauna.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

London's smallest police station is barely the size of a phone booth.

The final resting place to 300 Victorian-era pets hides inside the city park.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

Famously misunderstood wonder of the ancient world

The oldest working mechanical clock in the world.