An extensive network of bike paths and relatively flat terrain make Montréal ideal for bicycles. The Bixi (a contraction of "bicycle" and "taxi") system—with more than 3,000 sturdy aluminum-frame bikes at more than 300 credit-card operated stands throughout the city—makes two-wheel exploring easy. For just C$5 you can take as many bike trips as you like over a 24-hour period, or for C$12 you can extend that to 72 hours. A one-way trip is C$2.75. Pay attention to the time, though: the system is designed for short hops; keep any one bike for more than 30 minutes, and you'll be charged extra.