The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

A gas station has taken the place of the home of the 19th American President.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The lowest point in South Dakota and the source of the Minnesota River.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

Explore the dark underground corridors of this graffiti-covered former military fortification.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.