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

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

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

This Toronto garden collects stares and tchotchkes in equal measure.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

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

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

Quite possibly the last cross all humans will ever see.

Soaring over the Niagara Whirlpool since 1916.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

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

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

A park full of outsider art, created by college students studying outsider art.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This park contains a number of standing stones meant to heal and inspire.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

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

An abandoned stretch of highway, deteriorating next to the operational one.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A crumbling hospital from the 1850s on Roosevelt Island.