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

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Built in 1512, the oldest cathedral in the Americas.

The final resting place of Christopher Columbus - or possibly someone else.

A toxic ghost town sitting atop a massive coal fire.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Built by the patriotic residents of Boonsboro in a single day.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The trials and tribulations of marking Poe's grave.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

This landmark cemetery in Boston was created more than 300 years ago.

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

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

One of the oldest living oak trees in the Southeast.

Paths are maintained, but trees have taken over plots.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Step back in time on this preserved 1800s farm.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.