A monument to the center of the North American continent may be off by a few miles.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

Priceless space junk on display in front of a local Dairy Queen.

Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

A castle on a hill once named "the most beautiful high school in Massachusetts."

Once a kitschy symbol for a gift shop, this 38-foot seahorse is now a staple roadside attraction.

These three lighthouses played a fundamental role in the maritime life of Eastham.

A whimsical monument deep in this park commemorates the groups that helped build it.

One of the last-standing and most prominent structures from a long-lost colonial port community.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

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

Once America's tallest structure, now a Baltimore landmark.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The massive Roman arch in New Hampshire that was meant to be a tomb.

Two distinctive homes on a New England village green look like a couple of frosted wedding cakes.

A beautiful, creepy 19th-century castle stands incongruously in rural Vermont.

A feminist who put a pretty face on suffrage when she rode a horse through the Capitol.

"Call for the doctor, call for the nurse... Vote!! said the lady with the alligator purse."

Rochester's signature culinary delicacy.

The home, museum, and death site of Kodak's influential founder.