Custom House & Tower
At the time of its construction in 1847, the Custom House was the most expensive ever built in the United States and today it is one of Boston’s most recognizable buildings. It resembles a Greek Revival temple and features an iconic tower that was added in 1915, earning it the title of the city's tallest skyscraper. Today, Marriott operates it as a hotel and vacation club, but the public can take two elevators up 26 floors to the observation deck for unparalleled views of Downtown and Boston Harbor. Tours (30 minutes) leave once daily at 2 pm; there are no tours on Friday. Tours are free, but space is limited, so call ahead to make a reservation---tours book out months in advance.