The best place in the world to buy tinned fish.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This early version of the guillotine was used to execute the man responsible for its construction.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

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

An ancient octagonal weather station named for the eight Greek gods of wind.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

A sharp sculpture made of thousands of pieces of jagged glass.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

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

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

A six-ton wedding present for the King of the Scots.

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

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

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

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The most visited, and possibly most controversial, museum in Germany.