Singapore officially the republic of singapore is a sovereign city-state and island country in southeast asia. It is much more than the sum of its numerous attractions. Its constantly evolving, reinventing, and reimagining itself, with people who are passionate about creating new possibilities. The orchard road district, which is dominated by multi-story shopping centers and hotels, can be considered the center of tourism in singapore. Other popular tourist attractions include the singapore zoo, river safari, and night safari, which allows people to explore asian, african and american habitats at night without any visible barriers between guests and the wild animals. Jurong bird park is another zoological garden centered on birds, which is dedicated to exposing the public to as much species and varieties of birds from around the world as possible, including a flock of one thousand flamingos. Sentosa is a relatively large island of singapore located to its south. Along with a beach-front resort, the islands tourist attractions include fort siloso, its historical museum, the underwater world aquarium, and the tiger sky tower. Singapore also features two casinos (integrated resorts), one the marina bay sands and the other, resorts world sentosa (home to universal studios singapore and madame tussauds singapore) the proposal of building the integrated resorts was controversial. Singapore has 3 zoos, namely, the singapore zoo, night safari, and river safari. The singapore zoo displays animals in open naturalistic, spacious, landscaped enclosures separated from the visitors by hidden barriers, moats, and glass, with various shows and events occurring throughout the day to allow visitors to interact with the animals. Singapore also has two asean heritage parks, which are the bukit timah nature reserve, an extensive nature reserve which covers much of the bukit timah hill etc.