Temple of Hercules Victor
The Temple of Hercules Victor in Forum Boarium was originally thought to have been a temple of Vesta. Although the temple is in the middle of Rome, the marble used to build the temple was from Athens!
The temple is located in the oldest forum in Rome, as was built around 2BC. Driving past the temple is a little strange, because on the one side you have a wonderful garden, and on the other a large and busy freeway. But then I suppose that can be said about many of the sites and places in Rome, whereby you can drive past an archaeological dig right next to an office building.
In case you are wandering, Hercules was the protector of the olive trade.