Old Post Office Tower (one of the city's tallest public observation towers)

The Old Post Office Pavilion's clock tower rises about 315 feet above Pennsylvania Avenue and has long been one of the tallest publicly accessible observation points in Washington, D.C. The tower contains an observation deck that offers panoramic views of the National Mall, monuments, and downtown Washington, and it has been a public attraction since the building's early years. The Old Post Office building dates from the late 19th century and its tower remains a distinctive vertical element in the city's skyline governed by the Height of Buildings Act.