Donald Trump bought the historic Old Post Office Pavilion and turned the building into a hotel, the Trump International Hotel Washington, D.C., which opened in fall 2016. The 1899 Clock Tower still crowns the building, however, and is open to the general public for tours and access to the fabulous 360-degree view, 315 feet up, of Pennsylvania Avenue, from the Capitol to the White House, and beyond to the National Mall. Until the Washington Monument reopens in 2019, the Clock Tower offers the most expansive vista in town. The National Park Service operates and maintains the building and provides interpretive programming. To reach the clock tower, you must venture down 12th St., behind the hotel, to enter through the door clearly marked “Museum & Clock Tower.” Ride the frosted glass-wrapped elevator to the top.