Amsterdam's Red Light District leaves little to the imagination.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This basement museum explores the art and artistry of fascism.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

This subterranean studio is filled with fascinating kinetic art.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This landmark Victorian folly rewards visitors with spectacular views over the Peak District.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.