A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

England’s ancient oak tree has such an impressive girth, people have been hosting parties within the hollow trunk for centuries.

The flock of plastic poultry is an ode to the classic comedy staple.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

One of the largest burial mounds in the Netherlands and Belgium.

Lombardy poplars planted to imitate the size and shape of the Cathedral of Notre-Dame de Reims.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A beautiful maze marks where three countries meet.

Black cat statues guard this temple-like Egyptian revival factory.

Where Mary Shelley’s 'Frankenstein' and John William Polidori's 'The Vampyre' were born.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Every May, townspeople welcome summer with a bizarre pagan parade led by a man wrapped in garlands.

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

Reproductions of nine banned oil paintings coyly hidden behind a curtain in a New Mexico conference room.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The first and only carousel with a lineup entirely of insects.

This charming English house was once the home of England's most famous poet.

One English town's celebratory landmark spurred more trouble than anticipated.