On the right bank of the Río Ozama, Santo Domingo's colonial district is dotted with historic monuments, handsome mansions and fascinating museums along streets laid out according to a grid plan that became the model for other cities in the New World. Explore this old colonial city on foot: Parque Colón, the centre of the district, where the Catedral Santa María la Menor stands; Plaza de España, festive area beneath the Alcazar de Colón, Calle el Conde, the main shopping street, and Calle Las Damas, which leads to the Fortaleza Ozama.