The city's main post office abuts its former location, now the Frist Center for the Visual Arts. The most convenient branch for downtown visitors is in The Arcade, a covered walkway between Fourth and Fifth avenues, two and a half blocks north of Broadway. Monday-Friday 7:30 am-6 pm, Saturday 9 am-2 pm. 901 Broadway (between Union Station and the federal courthouse), Nashville. Toll-free 800-275-8777.