The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

360° views of the city plus five floors of optical illusions and hands-on science.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The patron saint of spinsters grasps a container of dried blood.

The telescope that discovered Neptune.

This famed marionette theater and museum is bursting with imaginative string puppets.

Four-story slides send people whizzing through the math department at this Munich university.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

One of downtown Berlin's last reminders of its Communist past.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

The footprint of a frustrated devil in Munich's Cathedral.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The prototype for all Nazi concentration camps.

A stairway to heaven, or to nowhere at all.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.