Koror is the state comprising the main commercial centre of the Republic of Palau. It consists of several islands, the most prominent being Koror Island (also Oreor Island). Scuba diving shops and facilities are located all over Koror. Accommodation like hotels, bars, restaurants, cafes, and resorts are all available. Dolphins Pacific, the world's largest dolphin research facility, is open for tourists who are interested in swimming and interacting with trained dolphins. Most tourists to Palau stay in Koror, which is the centre for Palau's resort services and house modern conveniences. Koror also has businesses that cater to speakers of many languages.