Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

Home of the only civilian casualty at the Battle of Gettysburg.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A school-themed restaurant where gastronomy is the core curriculum.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Three hundred years of preserved Spanish colonial history in San Antonio.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A giant Troll lurks under one of Seattle's oldest bridges.

The decorations were inspired by an unlikely missing treasure.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

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

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

The first memorial dedicated solely to the Black troops who fought for the Union.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

An overlooked memorial honoring the local Washington residents who died in World War I.

Look closely and you’ll notice that the color changes a third of the way up the tower.