A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

Remnants of 19th century vigilante justice.

A true roadside icon standing on the same plains that the herds once roamed.

The metal bird, nicknamed "Sandy," stands nearly 40 feet tall and is an homage to the birds that migrate through North Dakota every year.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Two stone markers honor the Nipmuc people who first settled here millennia ago.

Dedicated to a local cow who escaped a slaughterhouse and became an international symbol of peace.

Order the extra snappy, steamed hot dogs at this fourth-generation-run New England diner.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This national landmark is also home to a massive treehouse.

The second-tallest water tower shaped like a peach in the American South.

Permanent exhibit reminds visitors of the Exxon Valdez.

A trading post in the North Pole where children send letters.

The collection includes seven one-of-a-kind automobiles, vintage fashion, and more.

A cable-suspension footbridge that hangs high above the Mill River.

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

Endless rows of boxes of paper records line the hallways of the archaic federal facility where guns are traced.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Once the home of a noted Civil War spy, the two-story brick house now serves as a museum.

A giant time capsule not scheduled to be cored until 2040.

Along this wire fence, travelers have been leaving a particular memento since 2012.

A small burial ground honoring Native American veterans of the Revolutionary War.

This "common-as-dirt" museum celebrates the glory of normalcy.