Panama City is a hassle-free place to explore on your own: many people speak English, the U.S. dollar is legal tender, and there are ATMs, restaurants, pharmacies, shops, and taxis just about everywhere. You can explore some areas on foot, though distances between neighborhoods make taxis (or perhaps the shiny new Metro rail system, depending on your destination) necessary for most trips. If you ever feel uneasy about a location or situation and there aren't any police around, just flag down a taxi, which are safe and everywhere. Be sure to agree on the fare before boarding the taxi, as drivers are notorious for overcharging foreigners. Tourism police patrol the Casco Viejo and Panamá Viejo on bicycles. If you have a medical problem, go to Hospital Punta Pacífica, the best private clinic in the city. It also has a dental clinic.