Vacations To Go - Cruise agency based in Houston. Includes cruise search, ships, ratings, port information and contact information. Cruise Center - Houston, TX based agency. Site offers online itinerary information, but bookings must be done by phone Prestonwood Travel - Dallas cruise, golf and vacation travel agency. Tropical Sails Corp - El Paso agency offers cruises and yacht charters with several major tall ship sailing companies worldwide. European Barging - Houston area agency. Specializing in barge and river cruises in Europe. Sun Travel Discount Cruises - El Paso, TX based agency. World Luxury Cruise Vacations - San Antonio-based agency specializing in river boat and small-ship cruises. Keene Luxury Travel - Dallas cruise agency that offers escorted tours.