An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

A lone tower rises above the cliffs in a city park, offering fantastic views of the Connecticut landscape.

Public outcry led to this bridge's unique character which celebrates a giant frog battle and also sewing.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Who knew the Devil's domain was a hot spot for tubing?

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

A former copper mine which became a truly unsuccessful prison.

A tribute to the truly loyal dog who waited outside a hospital for his owner to come back.

Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

Inside a state forest, the forgotten remains of a Cold War defensive installation.

This tiny square mile of Canadian sand was once considered the world's smallest desert.

Roadside collection of 65,000 signs.

At a lodge and RV park is a collection of headwear that comes in at more than 11,300 and counting.

Home to vintage vehicles and local artifacts, this museum also houses a rare taxidermy specimen.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

This legendary urban waterfall creates a dazzling display of rainbows.

This hulking behemoth is actually five interconnected towers built in the 1960s.

This high desert botanical garden is a unique display of New Mexico’s ecology and culture.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A hotel with a rich Wild West history of miners and bootleggers.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This spectacular track has run continuously since 1882.