World's first "penitentiary," meant to be humane, drove men insane.

Dr Barnes' $25 billion private collection of art and arboretum.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

This elaborate towering structure was once famed for its revolutionary height.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Alexander Hamilton’s creation caused quite a bit of controversy.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Yo, Adrian!

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

An old world fairytale-land with over 350 fairy folk figurines hidden amongst 800 year old cedars.

Fossils, railroads, and waterfalls!

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Try the alligator at this fondue spot, which has been catering to "lovers and hedonists" since 1967.

The New Central Library is a masterpiece of contemporary architecture in the midst of downtown Calgary.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

A rescue facility that caters specifically to wolf-dog hybrids, and educates about these unique animals.

This colorful, ornately-decorated cemetery sits next to a quiet cove known as "the beach of the dead."

A sculpture dedicated to the trade that gave the town its name.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

Watch bison, elk, and other wild animals up close at this national park.

Possibly the world’s easiest Easter-egg hunt.