A few suggestions.....The huge William Kentridge mural on the Tiber embankment wall, Triumphs and Laments, between Ponte Sisto amd Ponte Massimo is well worth seeing. You can also see the inside of the Palazzo Farnese ( the Carracci room is amazing) but you have to book at least a week in advance online as it is the French Embassy now, and they only allow a few visits every week. see [www.inventerrome.com] The Villa Giulia ( now the Etruscan Museum) is an architectural 16th century gem and The Centrale Montemartini Museum in the Ostiense district, in an old power station is magnificent and is always almost empty.