The first transatlantic wireless signal was received at this 17th-century fort.

The remains of an attempt to carve a thriving metropolis from the forest, and once home to the first revolving door in North America.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

A Turkish ghost town abandoned in a population exchange with Greece.

Underground tunnels once home to crime are now back open to the public.

This empty Detroit high school was too expensive to maintain or destroy.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

The statue of the famous elephant who was the original source of the word "jumbo".

The oldest continuously inhabited street in America.

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

Secret Swing.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Canada's first pet cemetery is now abandoned.

The remains of the worst military aviation accident in Canada's history.

A complicated, forgotten beacon of hope for thousands of immigrants, "Canada's Emerald Isle" lies in ruin.

Explore the ruins of war and maritime history along this gorgeously ferocious North Atlantic seascape.

The ruins of a rehabilitation center for World War II vets can be found in the Westminster Ponds Conservation area.

This extensive nuclear fallout shelter built from 42 school buses could house 500 people in its tunnels.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.

Train tunnel running underneath Quebec City.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.