Santo Domingo Sightseeing Tour. Explore the highlights of Santo Domingo on this 4-hour sightseeing tour of the Dominican Republic's capital. With commentary from your local guide, visit 3 Eyes National Park and the Colonial Zone, listed as a UNESCO World Heritage Site. See Catedral Primada de America, the oldest cathedral in the Americas, as well as Plaza de Reloj del Sol and the Iglesia de los Jesuitas among other landmarks. This coach tour includes pickup and drop-off at your Santo Domingo hotel. Book this Tour and Save 30%! Santo Domingo Sightseeing Tour.