These natural resources, together with its proximity to tourist markets in Europe, have stimulated rapid growth in tourism in the region. The number of resorts has increased from three in 1982 to ninety-one in 2000. Guest nights also increased in that period from sixteen thousand to 5.1 million. Companies that have invested in the city include Hyatt, Accor, Marriott International, Le Méridien, Four Seasons Hotels, and Ritz-Carlton, with categories of three to five stars. In 2007, the first aqua park hotel resort opened in the area. The four-star Aqua Blu Sharm Resort was built on the Ras Om El Seid, with an area of .