Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The walls of the iconic dome are hollow and have a secret stairway.

The oldest continuously operating fish market in the United States.

A nostalgic bibliographic gem.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

A working monastery hidden away in Brooklyn once abutted the location of a former inebriate's home.

Once America's longest-manned military fort, now an abandoned hulk.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Memorial built in 1922 in remembrance of WWI casualties.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The first American department store, and home to the largest operating musical instrument in the world.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This nine-story building can be played like an instrument.

This downtown Dallas art installation is always on the lookout.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

A private collection of massive steel monsters guarding a Texas pipe works.

A 30-foot stack of piano keys memorializes one of the greatest keys players in jazz history.