Puerto Rico Guest® A Travel & Sports®, Inc. MasterGuide™ to Puerto Rico, © 2008 Select Language English | Español | Deutsch | Francais | Portugues Expert Help | Email this page | 33720 | Packages / Coupons / Auctions | Create Your MasterGuide™ | Advertise Fuerte San Geronimo > Puerto Rico > San Juan: Puerta de Tierra > Attractions & Sights Directly behind the Caribe Hilton. Small fort originally designed to guard the entrance of the Condado Lagoon. All photos © by their respective owners. Photos may not be reproduced in any form without the owners written permission. Symbol Key: Sponsors, Attractions & Sights.