This historic fort spans more the 300 years.

This former factory has deep ties to rubber production in Akron.

After the comedian dissed a Connecticut town on his show, they named a sewage treatment plant after him.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A vaudeville performer mounted this hollowed-out redwood log onto the chassis of a truck, and toured the country spreading a message of conservation.

An early 20th-century fire lookout, still in intermittent use, preserves legacy fire-locating equipment.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The place where travelers of the Mohawk Trail forded the Deerfield River rather than pay the toll at the turnpike bridge.

One of the largest wildlife refuges in the contiguous 48 states, it was instrumental in preserving the pronghorn antelope from extinction.

This sandstone mansion was the home of two of Oregon's most important pioneers.

This natural wonder is disappearing at an alarming rate.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

The famed poet was born in 1819 in a farmhouse built by his father.

It is one of the few places in Rochester that has both Union and Confederate soldiers buried and honored.

The poet Walt Whitman was a frequent visitor to this spot, the highest on Long Island.

The Catskills retreat of naturalist writer John Burroughs.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

This ominously named New Jersey street seems to be attracting over-the-top legends of its own making.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.