The land is home to swimming ponies and a legendary 18th-century treasure.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Elvis's own personal tropical hideaway.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

This jail which was in service for over a century is now open for curious visitors.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A local prank turned town icon.

Yo, Adrian!

The oldest farmer's market in America is so ancient it was approved by the King of England.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

One of America's first spies started out as a teacher in this little red one-room schoolhouse.

A parade of antique steeds offers a quirky ride through history.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.