The Sun Dial, Reloj de Sol is Spanish, is located on Calle Las Damas in the small Plaza Reloj de Sol across form Casa Reales.
It was erected in 1753 and is one of the oldest sun dials in all the Americas. It has two vertical dials or faces s it can tell accurate time in the morning and afternoon.
In this pre-dawn picture you can see the glowing on the Rio Ozama as the skies brighten with the approach of the new day.
#38 on the Colonial Zone Map