Rome

Four days of Rome is definitely not enough.
Still we only had four days, and we made the most of it.
Day 1: Coloseum and Forum Romanum

Day 2: Vatican Museums (we waited 2 hours to get in)

The Laocoön Group

It was not allowed to take pictures in the Sistine Chapel ...

Day 3: General sightseeing, like the view from the top of the Monument to Victor Emmanuel II, and St. Peter's Basilica.

Day 4: Pantheon and more general sightseeing

Beautiful City, great food, and about a million tourists (at least - one would think end of October there would be fewer)