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

An abandoned town is hidden in Great Smoky Mountains National Park.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

Visit this playground of waterfalls, caves and sinkholes.

The secret city built by the Manhattan Project.

Narrowest house in Boston.

The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

One man’s hobby is another man’s world of metal wonders.

Hundreds of samples of "Devil's Rope" hide in a defunct vintage elevator.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

When he found his hometown was no more, Lowell Davis decided to recreate a "new" ghost town from scratch.