This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

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

A quirky assortment of musical marvels from around the world.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

A seasonal movie monster museum featuring wax creations by a relative of one of the original Universal Studios monsters.

A statue honoring 44 continuous years of greeting passing ships.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Colloquially known as "the lynching memorial," this is the United States' first memorial to the victims of racial terror at home.

The terrified face of Henry Wells is etched on this garret window.

This 1,500-acre development hopes to be the Central Park of the South.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The rocks in this arid basin leave trails of movement behind them.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Within this lovely Richmond cemetery lie the remains of famous Virginians and some of Edgar Allan Poe's most beloved family and friends.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

Parking garage where Bob Woodward met Watergate source "Deep Throat."