Take your tour to a new level by doing it on a bike at Urban AdvenTours. These environmentally friendly tours keep your heart rate up while you participate in a guided tour. Bicycle rentals are available for those who don't have their own, and safety is of the utmost importance. You can take a City View Tour, Tour de Boston, Tour de Cambridge, tour of the Emerald Necklace or enjoy their Bikes at Night excursion. If you'd rather leave the guide behind you can simply rent a bike, grab a map and do the tour yourself. Running between $40 and $75.00 for a guided tour for a one and a half to four hour tour, you can pick the ride that's right for you.