Vatican City is located just across the river from most of Rome's iconic landmarks and is easily accesible using the metro. Here you can find the Sistine Chapel and St Peter’s Basilica. For a full list of things to do and how much they cost, click the button below.
One of the most well preserved Imperial Roman buildings, check out this temple built by the Emperor Hadrian for only $6! The outside square and fountain are a great sight even without spending any money.
Only a 2.5 hour trip from Rome!