Live long and prosper in Tennessee.

One street divides a single town that stands in two U.S. states.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

This improbable contraption was passed down through five generations of industrious Tennesseans.

Hidden amid a collection of trails is the site of a tragic crash.

An art instillation for the sake of "raising vibrations."

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

An overgrown garden stands as a grim marker of an unrealized dream.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

A giant ball made from pieces of an old Jeep.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

This Old Testament garden features 100 plants from biblical times.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Pennsylvania's own Roswell-style UFO mystery.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

One man's swirling six-acre monument of stone.