A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

All that remains of a Japanese fishing vessel that ran aground in 1982.

A beloved tribute to the Fab Four and the freedoms they inspired.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Ruins of a German castle on top of a towering stone pillar.

Steadily reminding Czechia of its past.

A huge Megalithic chamber tomb located behind a cafe.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Historic medieval fortified city in southwest France.

Paris' linguistic guide to the international language of, yes, love.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

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

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

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

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.