A lecture hall sink once used by Einstein and other noted physicists is now regarded as a strange science relic.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

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

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

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

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.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A tiny 1857 chapel sits on top of a secluded, forested hill.

The only thing these street signs will help you navigate is your imagination.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

A theme park attraction designed to turn your children into LARPers.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

A bizarre house filled with an astounding array of collections.

Prolific outsider artist Sid Boyum's concrete sculptures add whimsy to Madison's Schenk-Atwood neighborhood.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.

This striking art museum holds an amazing series of curiosity cabinets.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

There aren't too many operational funiculars around, but Pittsburgh has two!