The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

A walk through the historic city center, under the streets of Seattle.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

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

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

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.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

The rogue roots are gradually consuming some of the historic marble grave markers.

One street divides a single town that stands in two U.S. states.

The highest point in Virginia can only be reached by passing through ponies and flowers.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

This replica of the Greek structure is in the heart of Nashville.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

A public urinal so pretty, it was declared a national monument.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A beautiful maze marks where three countries meet.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.