The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The glowing blue Nymphaeum of Emperor Tiberius.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A former waterfront market is now in the center of town due to some interesting Boston engineering.