Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

Once a resting spot for King Fernando VII.

The remains of this misplaced church were moved here stone by stone.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

A replica of the lost rock cliff that was once significant in Singapore's maritime history.

Legend holds that a tortoise turned itself into this island to save two shipwrecked sailors.

Looming communist pillar with a Czech twist.

An Orwellian sculpture with eyeball cameras watches passersby.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

This spooky statue sits outside a famous Prague theater.

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

This artificial cave looks like something out of a fairytale.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

A mocking tribute to the past and modern leadership of Prague.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A surreal statue honoring Prague's favorite literary son.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.