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Key West is a very walkable and compact city, especially in the Old Town area where most of the main attractions, restaurants, bars, and shops are located. Many visitors find that walking or using a bike, scooter, or electric cart is much more convenient than driving, particularly because parking can be limited and expensive.
If you are staying near Duval Street or the historic district, you can easily access most sites on foot. Walking allows you to enjoy the architecture, colorful streets, and local shops at a leisurely pace.
However, if you plan to explore areas outside of Old Town, such as the southern beaches, Fort Zachary Taylor, or the southernmost point, having a car or renting a bike/scooter can be helpful. Driving within the town itself is often slower due to traffic and limited parking.
Other tips:
In summary, for most first-time visitors or those staying centrally, walking or using a bike/scooter is recommended over driving. Cars are mainly necessary for outer areas or if you have mobility concerns.