Lake within a lake.

Little island known for its massive beachfront "flowerpot" pillars.

This natural sea cave hides a small wonderland of natural turquoise beauty.

One of Mother Nature’s geological gems, home to many prehistoric fossils.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

Stunning views over Ontario's old-growth pine forests.

A school teacher's massive and terrifying self-built castle.

The mansion home of author Edith Wharton.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

Fossilized sea bottom and lime quarry.

The summit Roosevelt conquered before he descended to become The Chief.

Teddy Roosevelt’s famous “midnight ride to the presidency" started at this small lake high up in the Adirondacks.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

A toxic ghost town sitting atop a massive coal fire.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This once luxurious Catskills resort is now a haunting ruin.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

An abandoned castle owned and ignored by Masons carries a cursed history.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.