Umbria is a beautiful part of Italy. Assisi and Perugia are fabulous places to visit, full of interesting things but comparatively unspoilt. Go visit them while they stay that way. I can remember Venice when it was a lovely place to visit. But then I am old.
More on Umbria in this article
http://www.lonelyplanet.com/italy/umbria/travel-tips-and-articles/76846?affil=twit