This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Time travel with sweets across history at this research-based candy store.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The most loyal of little dogs, or a Victorian era publicity stunt?

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.

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

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

The final resting place of soldiers' loyal canine companions.

The poet’s tombstone keeps getting vandalized by her fans.

A ruined farmhouse that inspired an (inaccurate) illustration for Emily Brontë’s 1847 novel “Wuthering Heights.”

The English bed-and-breakfast believed to have inspired Emily Brontë's novel "Wuthering Heights."

Some of the most enduring novels in English literature were written within the walls of this Georgian-era building.

Where Agatha Christie mysteriously disappeared in 1926.

The last fully working Victorian Turkish bath in England.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

An old railroad crossing that’s been converted into a pedestrian bridge.

Situated in a bustling intersection, this "mobile" monument that honors local veterans from five different wars has moved several times but appears to have found its final resting place.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

At 207 feet, one of the world's longest continuous escalators.

Macabre astrological automaton clock dating to the late 1400s.