This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

Terraced flowerbeds and rock sculptures in the midst of the Minnesota wilderness.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

When flour explodes, it's not a pretty sight.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Half of a waterfall goes into the river while the other half seems to disappear.

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

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

One of America's most historic homes also holds a startling literary legacy.

The homestead of American patriot John Adams.

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

The site of Paul Revere's historic two lantern warning.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The second oldest continuously operating bar in Louisiana.