This could go under museums as there are several in the building, but I haven't visited any of them yet! But I do love the building, sitting on the terrace overlooking the Thames and the courtyard, which has a 'jumping fountain' you walk through and in the winter an ice rink(which is over-priced and needs to be booked weeks in advance, but the atmosphere is brilliant). The galeries charge an entrance fee, but the terrace and courtyard are free.
