A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

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

A public urinal so pretty, it was declared a national monument.

Amsterdam's former hotspot for public executions and dissections.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

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

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

Cat art as far as the eye can see.

A floating cat sanctuary on an Amsterdam canal.

A copy of the brutal decapitation device that predated the French Guillotine by about 200 years.

This aging storage facility is the world's largest brick warehouse.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

17th century puritan church with connections to the Salem Witch Trials.

A thousand year old oak tree survives in Liverpool.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

This Manchester laundromat is hiding something.

One of the shortest streets in York has an especially odd name.

Makers and sellers of the original and finest York Ghosts.

Follow the original medieval paths that wind through this intriguing section of the city.