Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Copenhagen's celebrated theme park and gardens.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

A musical instrument played by the sea.

Large Hadron Collider and the Birthplace of World Wide Web.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This simple apartment may have inspired some of the most important theories in the history of science.

The bears of Bern have been a city highlight for over 500 years.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Vibrant street art created with mixed media.

An eerie, derelict amusement park in Berlin.