The streets of Old San Juan, Puerto Rico, are known for the colorful buildings and colonial architecture, but it is also filled with historic sites, monuments, and statues, marking contributions to the city’s rich history. Here are just a few of the moments in history along a short walk around the city. Plaza Colón Plaza Colón marks the entrance to the walled city of Old San Juan, where the Santiago Gate once stood. Looking uphill to the northeast, you will see Castillo san Cristóbal, part of the National Parks Service San Juan Historic Site. At the center of Plaza Colon is a monument to Cristóbal Colón, Christopher Columbus to us…