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.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

Some of the smallest works of art in existence.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

The tiny, studious rodents greet visitors to the National Archives of Finland.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

An alien church provides much needed silence in the midst of a Finland shopping center.

An abstract monument to a symphonic composer.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

A subterranean house of worship carved right out of the bedrock.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An underground nightclub helped spark a "Singing Revolution."

The Guardian of Tallinn.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A vintage video game wonderland in downtown Reykjavik.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

Iceland's tribute to its thankless civil servants.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This stunning concert hall has become a symbol of Iceland's national recovery.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.