Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

A moving memorial to the fallen and missing from WWI trenches.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

An ancient ossuary in Rouen.

His "Lionheart" is entombed separately from the rest of his body.

An art-filled botanical garden and former dyeworks hiding in plain sight.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

In France, a medieval-style home pays homage to an intrepid explorer who discovered Québec.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

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

Where the sleeping monsters of Scotland's oil industry are left to rust.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A naturally beautiful, seemingly bottomless deep blue spring.

A 12th-century fortress containing some of Berlin's oldest buildings.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.