The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Home of a French nobleman's short-lived attempt at raising cattle in the Badlands of North Dakota.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

A monument to the center of the North American continent may be off by a few miles.

A rim-made reptile in North Dakota.

This park straddling the United States-Canadian border has been a symbol of peace since 1932.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

The world's largest Holstein cow.

One man's quest to save his town with a trail of record-breaking sculptures.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The first transatlantic wireless signal was received at this 17th-century fort.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

A monument marks the location of the first successful steamboat demonstration.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

The ruins of this Alaska gold mine form a gorgeous ghost town.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

The remains of a large iron mill that once stood in the remote woods of northern Maine.

Its unique collection details the history of the state's svelte railroads.

The world's largest rotating world.