"This massive Romanesque Revival building completed in 1899 is covered with arches and turrets. It's a formidable presence on Pennsylvania Avenue, nicknamed America's Main Street. The building is now the grand home of the Waldorf Astoria Washington D.C. (the tower entrance is at the back of the hotel next to Sushi Nakazawa). This is also DC's second tallest structure, according to the GSA, second only to the nation capital's most recognizable building: the Washington Monument. But the Old Post Office Tower is much lower-profile for the tourist hordes, which makes a visit here a cheat code for taking in a sweeping view of the Washington skyline. No tickets or reservations are needed for a trip to the 270-foot observation deck within the clock tower." - Adele Chapin
