The maritime museum that boasts the largest nautical library in the western hemisphere.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

The resting place of a Civil War celebrity's amputated limb.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This large cemetery is known as the museum of granite sculptures.

Cryptid lake monster honored with its own monument.

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Beautiful hillside Vermont cemetery with amazing funerary art.

This balancing rock is one of Utah's most unusual geological formations.

The location where the iconic movie character declared it was time to go home.

Oddly shaped rock formation, misassociated with a nearby utopian community.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

The fifth-longest natural arch in the world, and the longest outside China.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A house carved into a rock in the 1940s.