Walk up the Spanish Steps to the Trinita dei Monti and experience a little bit of France in Italy.  When you stand at the bottom of the steps and look up this is the church you see at the top.  In the Piazza outside the church artists sell watercolors of various local sites.  It is also a good place for you to take pictures with Rome in the background.

Inside, the church has a number of frescoes and paintings.  There are several side chapels you can take a peak at.  The church is interesting and since it is right there it is worth a look, but not worth going out of your way to see.