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

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

A museum dedicated to exhibiting remarkable outsider art.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

A Canadian POW for German soldiers during WWII where prisoners hatched an elaborate escape plan.

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

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

Willy Wonka would love this weird half-a-home.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

This mouldering abandoned mental hospital was once a center for progressive healing.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Playable, historic pinball machines fill this Alameda museum.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Oakland's beautiful monumental cemetery.

Dive bar built out of the remains of a whaling ship.

Yugoslavia's biggest underground airport lies in ruins.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

One of the largest caves in the world open to the public.

A whimsical bridge adorned with decorative dragons.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

A former connection to City Island, it has been abandoned since the 1930s.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.