A beautiful 1920s tower filled with local hidden gems.

Is there such thing as too many fruit bats? Not anymore.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The final resting place of soldiers' loyal canine companions.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

360° views of the city plus five floors of optical illusions and hands-on science.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

Walk into the 19th century without leaving Brooklyn.

2,000 barrels of aging beer hidden in a warehouse at the Brooklyn Navy Yard.

A decommissioned military complex that's now a modern industrial park.

A no-frills cinephile haven known for showing offbeat, underseen films.

Haven for steampunks.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A Manhattan office building is home to the world's largest chess board.