The largest burial mound in the United States holds the remains of prehistoric West Virginians.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This circus town museum recognizes the outstanding clowns of history.

A large circus museum with summer performances.

At the time of its completion, it was the tallest dam in the world.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The first declared National Monument in the United States.

A beautiful geyser under environmental threat.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

This historic Victorian hotel has a scandalous history of affairs and murder.

A herd of colorfully painted bovine statues can be found in the middle of "cowtown."

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

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

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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.