These little-known sands dunes are a geological anomaly in Saskatchewan's southern prairies.

The world's largest moose statue is located (where else?) in Canada.

The unusual lighthouse looms over waves of prairies with no sea in sight.

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

The Twisted Trees of Alticane are an unnerving grove of Quaking Aspen, apparently mutated from a single source, giving them a twisted and unnatural appearance.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

On the Hudson resides one of the largest clocks in the world.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A former major munitions plant that has been converted into a sprawling art space.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Washington's iconic carousel has a nice piece of Civil Rights history.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Decades before the scandal, this staircase on the river was a literal "water gate."

The "lovely red Vega" of the legendary record-settling pilot.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.