A small but industrious mining operation that allows visitors to touch precious gems while they are still in the rock.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

The resting place of a Civil War celebrity's amputated limb.

This abandoned church languishing for decades is now one man's passion project and subject of paranormal investigators.

At Brandy Station, Civil War soldiers left their mark on the battlefield and the walls of this small wooden house.

The grave of a champion Thoroughbred hides within the former presidential estate.

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

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

A line of blue paint marks the route of the inaugural parade.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

This rustic old building is said to be the most photographed barn in America.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.