According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

Storyville was New Orleans' historic red light district and hotbed of jazz music, sometimes referred to simply as "The District."

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This elaborate towering structure was once famed for its revolutionary height.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

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

America's first federal monument.

A historic arena where the Beatles played their first concert in the U.S.

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

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A diminutive memorial marks the site of a successful assassination by a right-wing death squad in America's capital.

The site of the climactic scene from the classic horror film is now a historic landmark.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

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

This collection honors the iconic, and proudly American lighter that just won't quit.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A toxic ghost town sitting atop a massive coal fire.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Memorializing an American tragedy of massive proportions.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.