Next, curtains of purple light streak from north to south at a higher altitude, passing directly over the Washington Monument ... Excited oxygen atoms glow red above 120 miles and glow green ...

At the western end of the National Mall, the Washington Monument towers over our country’s capital. The 555-foot obelisk—a four-sided stone pillar with a pyramid-shaped top—was built to ...

Even if you're only in town for a short trip, visiting the Washington Monument and the White House – two marble symbols of the U.S. – is a must for any first-time D.C. visitor. Standing just ...

Ullman has whistled all over D.C., including whistling “Yankee Doodle Dandy” outside while on top of the Washington Monument when it was being repaired following the 2011 earthquake.