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

Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

Home to items never before seen by the public.

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

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

Right next to departures—how convenient!

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

An astounding collection of medical specimens, including bits of President Lincoln.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Scary stories haunt this wooden bridge.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

A swimming hole in the historic industrial quarry that supplied the marble for the Baltimore Washington Monument.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Wedged between two sets of row houses is an awkwardly located family graveyard.

This Asian-inspired tower in a lush urban park provides spectacular panoramic views of Baltimore.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”