A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

A French museum of wrought iron.

An ancient ossuary in Rouen.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

This museum houses an imposing skeleton army comprised of creatures great and small.

Abandoned railway line circling the city of Paris.

Rows of multicolored bathing huts paint the sand dunes with pops of color.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

This monumental mural crafted nearly 40 years ago is still in perfect condition.

After the construction of a nearby cathedral obstructed the view, the oldest belfry in Belgium was more than doubled in height.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

One of the largest underground systems runs under Canada's largest urban center.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

The oldest landmark of Toronto is a testament to shifting sands.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.