The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A statue honoring 44 continuous years of greeting passing ships.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

This university transit system is a 1970's vision of the future.

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.

A diorama of the Civil War, fought by cats.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Population: 1.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

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

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

The museum chronicling a treasure hunter's dream, fulfilled.

Before Nixon, "watergate" meant canals.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

You must take the A train... to the last active cemetery in Manhattan.

This stretch of highway is said to be haunted by ghosts of settlers whose graves were paved over.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.