This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

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

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

Burial site of the notorious Chicago gangster.

Stand at the point where the two mightiest rivers in the United States converge.

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The illuminated falls are a gem in North Cascades National Park.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

While seemingly a cruel joke, this bench actually honors an esteemed member of the community who passed away in 2006.

The grave of the 19th-century sea captain who coined the phrase "Old Glory" can be found in this quiet cemetery.

Victorian-era Egyptomania left its mark on this Nashville landmark.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

It may take some time to locate, but it's sure to warm even a heart of stone.

Inside this small brick bungalow is a collection of toys intended for the afterlife.

These ruins are all that's left of the former Alabama State Capitol.

The home of a 19th-century author who brought African-American folktales to the mainstream is now Atlanta’s oldest house museum.

Home of Dutchy, an exhumed Confederate statue that was once torn down by an angry mob for looking stupid.

The world's largest collection of ticks.

Beside some power panels, a plaque celebrates the history of an alternate world.