Riu Hotels is a hotel chain running several luxurious spas and resorts around the world, in the most paradisiacal destinations. At the site you can look at room and premises shots and make your reservations for lodging or for events (business, weddings and parties, for instance), or make a cancellation to those reservations.
The site also offers assistance to travel agents and travel-related professionals; in order to explore that part of the web you need to sign is as a member. Just fill in a short form and you will have access to rates and codes, booking procedures, incentive programs, commissions, regional tours and other stuff as well. Plus the site aims to encourage franchise-sale, so you can find lots of corporate information on it. 
