A World War II evacuation tunnel turned into a history display of Croatian state and people.

Where the lovelorn find a home for their sentimental keepsakes.

A whimsical bridge adorned with decorative dragons.

During World War II, this rice mill became a Nazi concentration camp.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Venice's "Island of the Mad."

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

This Scottish bridge seems to compel dogs to leap to their death.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Spend the night in this formerly abandoned traditional Scottish village.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This museum offers a glimpse into early 20th-century Glasgow life.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

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.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

An unusual round church in London with a Templar past.

Rebuilt remains of a temple to Roman god Mithras.

A haunting collection of the vanished and disappearing natural world.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.