The London statue that imitates passersby.

This one-room cabin where the young colonel slept during the French and Indian War.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Mesoamerican monoliths and zoomorphic stones covered in royal visages, ancient mythology, and grand celestial events.

This nine-story building is the oldest standing skyscraper in D.C.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

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

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

Where Venice's gondolas go for a tune-up.

D.C. once had its own tiny rival to the New York Stock Exchange.

A close look reveals that the Scottish monument is just slightly off-kilter.

A remarkably well preserved tower dating all the way back to the Iron Age.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

This former asylum for Black Americans is haunted by its history of violence and racism.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

Local legend says the remains of Father Christmas lie within the medieval grounds.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

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