Bond 24 will film in Rome between February 19th abnd March 12th, according to Italian news site ANSA.
Potential spoilers below

The site says there will be a night time car chase in Borgo Vittorio (near the Vatican) involving a Fiat 500, another car chase along Corso Vittorio Emanuele II and then onto Lungo Tevere, with a car ending up in the river.
But the highlight is said to be 007 parachuting from a helicopter and landing on a fifteenth-century bridge built by Pope Sixtus V.
The report also claims that Bond 24 will shoot in the Palace of Caserta in Campania.
None of the details are verifiable at the moment but given Bond 24 has a production office located at Cinecittà studios Rome as a location seems to be a given.
Source: ANSA