19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

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

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

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

Millions of numbers carved in glass represent the tattoos forced upon victims.

The largest collection of historic military firearms in the United States.

All that remains of the once-booming chain is a single orange-roofed restaurant.

Over fifty whirling pools left by the glacial age.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The hero of the women's suffrage movement birth home is now a museum dedicated to her legacy.

Why have you never heard of the second most popular tourist site in New York?

The Hudson River School comes alive at this palatial estate.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Two mermen, eternally spitting into each other's mouths.

At this farm in upstate New York, the former president plotted his reelection campaign.

A 13,000-year-old mastodon skeleton was found during the construction of a 19th-century New York mill.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

An exotic wildlife habitat right off The Strip.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A homage to the King at the hotel where he revived his career.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.