Main attractions of the Santo Domingo sightseeing tour. 1) Three Eyes National Park is a park with four underground lagoons within the city; each lagoon has its own name and meaning. 2) The Faro a Colón lighthouse is a landmark in honor of Christopher Columbus. 3) The Malecón is a 14-km-long waterfront promenade along the coast, with pedestrian paths and other spaces. 4) The Colonial Zone is the historic heart of the city and is home to many of its most important sites, such as the Cathedral Primada de América, Calle de las Damas, the Fortaleza Ozama, the Royal Houses Museum, and the National Pantheon.