The enclosed observation deck on the 50th floor of the Prudential Tower offers a 360-degree view of Boston and far beyond. You can see for miles, even (when it’s clear) as far as the mountains of New Hampshire to the north and the beaches of Cape Cod to the southeast. Away from the windows, interactive audiovisual exhibits chronicle the city’s history, and two short films screen in the on-site theater. Also here are fascinating exhibits, including video presentations about refugees, on the history of immigration to Boston. The admission price includes a narrated audio tour, available in versions targeted to adults and children. Call before visiting, because the space sometimes closes for private events.