This top-heavy concrete structure with a brick base has been one of Boston's controversial architectural statements since its completion in 1968. The building recalls the works of architect Le Corbusier and helped to bring the so-called Brutalist style to prominence in the US. If you're architecturally minded, you'll enjoy exploring the vast public spaces on the lower floors.
Address:City Hall Square 1, 02201 Boston
[daily except weekends 8.30am-5.30pm - closed Bank Hols]