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

This sublime architectural marvel is a rare example of an expressionist church.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Gothic tower mentioned in Thomas Hardy poem "The Channel Firing."

A 200-year-old prison that now houses a peculiar crime museum.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

Puzzles within puzzles hide a golden treasure in this hedge maze.

A petite castle folly in the English countryside.

Music boxes like you've never imagined.

One of Europe's oldest libraries.

Used as an example in one of the first dictionary entries for "museum" in 1706.