Puerto Rico Guest® A Travel & Sports®, Inc. MasterGuide™ to Puerto Rico, © 2008 Select Language English | Español | Deutsch | Francais | Portugues Expert Help | Email this page | 34273 | Packages / Coupons / Auctions | Create Your MasterGuide™ | Advertise Planetarium > Puerto Rico > Mayagüez > Attractions & Sights 787-832-4040 787-265-3844 787-832-1135FX Rt 2 Ramal at Post St. Mayagüez campus. Free admission. Open house second Tuesday of each month at 8pm during the school year. June and July open for educators workshops and summer camp, closed during July. Daytime group visits may be made by appointment. All photos © by their respective owners. Photos may not be reproduced in any form without the owners written permission. Symbol Key: Sponsors, Attractions & Sights.