Start your search for a cheap car rental close to Carnac Menhirs by selecting your getaway dates and pick-up and drop-off points. That’s how inexpensive a car rental can be around this leading attraction, but there are a few things that will determine the price — your getaway dates are just the start. Whatever your budget and preferred car type, Expedia has unbeatable offers from a big range of car rental companies that’ll get you in the driver’s seat for less.