This humble bench is considered the most beautiful in the world.

Aged nearly 1,700 years, the world's oldest bottle of wine is probably still drinkable.

A striking 12th-century-style castle built on the edge of a cliff.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

This plaque marks the former home of one of the first women physicians in the Netherlands.

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

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

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This unattributed sculpture in Amsterdam is hiding in plain sight.

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

The attic of a four-century-old canal house hides a clandestine church.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

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

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A restaurant and observation deck built in a unique broadcasting antenna.

Super-heavy Nazi architectural experiment.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

The most visited, and possibly most controversial, museum in Germany.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An old tram depot transformed into a vintage car paradise.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

The last bastion of Roman presence north of the Alps looms over a German town.

This 600-year-old home seems to defy physics.

Peek through a transparent pyramid and drink in the mountain made of books.