This former hydraulic laboratory is now a woodland dotted with old engineering models.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Museum preserving torture methods from the past.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

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

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

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

This town named for the ancient God of War is home to fewer than a thousand people, but it's the birthplace of the Greek Revolution.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

Step inside an ancient beehive tomb built for a mysterious cult hero.