This is an extra-ordinary site. At 167 feet deep, the Arecibo telescope has been the largest and most sensitive radio telescope in the world.
This is an extra-ordinary site. At 167 feet deep, the Arecibo telescope has been the largest and most sensitive radio telescope in the world.
Old San Juan, Puerto Rico, is one of the most interesting and beautiful cities in the world. Explore 7 amazing things to do in Old San Juan Puerto Rico.
Explore Puerto Rico with 15 Photos Things to do in Puerto Rico Colorful architecture of Old San Juan! Walking the streets of Old San Juan will make you question whether you’re in Europe or the Caribbean. Dazzling colors and roads…