A favorite museum with many Baroque treasures.
An antique papal palace with fantastic frescos and a rich collection of art.
An ancient Roman bath complex with a Renaissance-era building that houses a collection of ancient art. Once you are there don't miss the following nearby churches: Santa Maria degli Angeli e dei Martiri, Chiesa di Santa Maria della Vittoria, Chiesa di Santa Susanna, and Chiesa di San Carlino alle Quattro Fontane.
Go for the Baroque beauty of the Caravaggio chappel.