welcomed 974,379 overnight visitors in 2012, making it the top overnight tourist destination of the country. Manila is visited by the majority of international tourists coming to the country registering a total of 3,139,756 arrivals in 2012. Metro Manila has opened 4,612 hotel rooms in 2015. It is also expected to exceed the 3,500 annual addition of hotel rooms in the next two years. Gambling in Metro Manila has also become a popular tourist attraction in the region. Metro Manila is a popular gaming destination in Asia, rivaling other major gaming destinations such as Macau and Singapore. There are around 20 casinos in the metropolis, featuring luxurious casino hotels and integrated resorts. Its thriving local gambling market makes Manila attractive to casino operators. Popular gaming destinations are Resorts World Manila in Newport City in Pasay, Solaire Resort & Casino, City of Dreams Manila, Okada Manila, Westside City Resorts World, and NayonLanding in Entertainment City in Bay City, Parañaque. Intramuros is the historic walled area within the modern City of Manila. Originally, it was considered to be Manila itself at the time when the Philippines was under the Spanish Empire colonial rule. Owing to its history and cultural value, Intramuros and Rizal Park were designated as flagship destination to become a tourism enterprise zone in the Tourism Act of 2009. Intramuros is managed by the Intramuros Administration. The architecture of Intramuros reflects the Spanish colonial style and the American neoclassical architectural style, since the Philippines was a colony of Spain and the United States before it was granted its independence in 1946. Kalesa is a popular mode of transportation in Intramuros and nearby places such as Binondo, Ermita and the Rizal Park. Popular tourist destinations in Intramuros include the Baluarte de San Diego, Club Intramuros Golf Course, Cuartel de Santa Lucia, Fort Santiago, Manila Cathedral, Palacio Arzobispal, Palacio de Santa Potenciana, Palacio del Gobernador, Plaza Mexico, Plaza de Roma, San Agustin Church and its newest tourist attraction, the Ayuntamiento de Manila. Some of the country's oldest schools are founded in Intramuros, these are the University of Santo Tomas (1611), Colegio de San Juan de Letran (1620), and Ateneo de Manila University (1859). Only Colegio de San Juan de Letran (1620) remains at Intramuros; the University of Santo Tomas transferred to a new campus at Sampaloc in 1927, and Ateneo left Intramuros for Loyola Heights, Quezon City (while still retaining "de Manila"