Since cheetah-shoes don't yet exist, and a tree stump with a saddle on it is hopelessly immobile, bicycles remain the best way to tour a city. See the sights in two-wheeled fashion with today's Groupon: for $32, you get a guided bike tour (a $65 value) from Bay City Bike, a professional bike-rental company located in Fisherman's Wharf. Every day at 10 a.m., enthusiastic guides lead tours along the waterfront before venturing across the Golden Gate Bridge and coasting down to Sausalito for a journey that takes up to three hours. Once the excursion's over, customers can continue their cycling and sightseeing by themselves for the rest of the day, exploring the road to Tiburon or gliding on trails through the gargoyle-infested Muir Woods (click here to view the rides map). A complimentary ferry ticket is included, letting guests sail back to the shop once legs are tired and eyes are fussy from taking in so many picturesque vistas.

Reviews

Nine Yelpers give Bay City Bike an average of 4.5 stars and 10 Citysearchers give it a four-star average.

• The staff was extremely nice and friendly. They explained their maps based on where we wanted to go, and demonstrated everything else we needed to know. – Erin N., Yelp
• It was really incredible riding a bike across the bridge. We got some good photos, and ate good Italian in Sausalito. It was just a great day. – nathan78, Citysearch