A Wild West jailhouse that slid down the mountainside.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

Bits and pieces from the ill-fated Donner Party's winter cabins.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Largest Roman Catholic church in North America.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Three hundred years of preserved Spanish colonial history in San Antonio.

A 131-year-old wunderkammer of Texas history.

Strange physical sensations and optical contradictions keep visitors coming back for more.

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

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

An artificial crater field that trained astronauts for lunar exploration.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The king of U.S. high points towers over every other peak on the continent.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.