This deceptively salty lake looks like blushing pink lemonade.

A tiny island home to a former English slave fort.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

The oldest housing complex in Riga is a mini timeline of architectural trends.

The closed and crumbling Francoist luxury resort for workers is still full of life—for now.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

In the Netherlands, one of the world's largest private car collections can be found.

The Netherlands is home to a bridge printed out of reinforced concrete.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

The world's largest collection of ships in bottles.

Where lovers tie birch branches into long-lived knots.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

Two gravestones clasp hands over the religious divide.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

A collection of biblical memorabilia.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.

Incredible labyrinth of man made caves.

Sail in for a ’dam good slice.