Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

This museum is filled with an eclectic collection of unique inventions.

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

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

Oldest Museum of the Netherlands is a true cabinet of curiosities.

Colorful and chaotic stacked hotel in North Holland.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

Each spring, residents of this Czech town hoist a 'slain' metal dragon onto the city hall to commemorate a local medieval legend

Dedicated to the man who saved hundreds of children from Nazi-occupied Czechoslovakia.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

Stroll past dozens of intricately-detailed scale replicas of buildings from all over Czechia.

Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Visitors flock to the historic birthplace of radiobalneology for its therapeutic radium treatments.

Enormous sandstone towers loom within a Czech forest.

The former headquarters of history's oldest megacorporation.

A set of seven houses, each built in a style that represents a European country.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

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

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

A curious collection dedicated to human and animal anatomy and pathology.