Castello Sforzesco.

This mammoth Renaissance castle now houses a series of museums, incl the brill Pinacoteca, but book (see below) to tour the ace secret ducal passages. Piazza Castello / M: Cairoli / 02 88463700 / grounds 7am-6pm daily, till 7pm Apr-Aug; museums 9am-5.30pm Tue-Sun / 02 88463703 / milanocastello.it / call Ad Artem Mon-Fri on 02 6596937 for secret passage tours held 9am-5.30pm Sat, night tours Jun-Oct / adartem.it