Inside the Wayne County airport is an amazing collection of lights and sounds.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This 19th-century hotel and spa hosted famous guests like like the Vanderbilt family, William Waldorf Astor, Helen Keller, and Jay Gould.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Mai Tais and Navy Grog served up in one of the original tiki bars.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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.

America's post-nuclear-attack chambers of Congress.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The world's longest known cave system.

This replica of the Greek structure is in the heart of Nashville.

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

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A bizarre roadside attraction and the first instance of miniature golf in the world.

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

A Nessie-like monster supposedly lurks in this lake.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This "castle" is actually a limestone and quartz formation hidden along a trail.

At 207 feet, one of the world's longest continuous escalators.

The national park was once a plantation estate.

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.