THE Singapore Tourist Promotion Board's (STPB) 17 offices worldwide play a vital role in promoting the country's image. To maintain Singapore's popularity as a value-for-money destination, the STPB, together with the Consumers' Association, encourages fairtrading practices through the ''Good Retailer'' scheme. This scheme identifies retail stores that offer fair prices and quality products to both tourists and local residents. The STPB also encourages cultural festivals, the arts, sporting and entertainment events. It helps to highlight and promote many of the local festivities, such as the World Singapore Invitational Dragon Boat Race, the film festival and various light-ups during the ethnic festive seasons. Among Singapore's top tourist attractions is the Sentosa Island resort. Sentosa, only half a kilometre to the south of Singapore, is easily accessible by cable car or ferry and also well served by a monorail. Popular attractions include the Pioneers of Singapore and Surrender Chambers Museum, the Butterfly Park, the Rare Stone Museum, the Coralarium and the Musical Fountain. Visitors can also experience Underwater World Singapore, the largest oceanarium in Asia, which gives a close-up view of marine life through a 100-metre-long acrylic tunnel. The oceanarium features more than 200 species of fish and 2,300 specimens of tropical marine life. Singapore's colonial heritage is spiced with a multi-cultural past, and embodied in its ethnic districts. These are highlighted in most of the STPB's promotion programmes. Chinatown, Little India, Arab Street and Kampong Glam are all part of a conservation programme that has enabled visitors to experience Singapore's cultural diversity. Weaved throughout the Tanjong Pagar district are stories of the past from more than 200 pre-war shop houses now occupied by pubs, tea houses, novelty and antiques shops and boutiques. The renaissance continues at Clarke and Boat Quays. where godowns and shop houses have been transformed into shops, restaurants, galleries and entertainment venues.