Banking Corporation (OCBC), Development Bank of Singapore (DBS), and United Overseas Bank (UOB). In 2011, amidst the global financial crisis, OCBC, DBS and UOB were ranked by Bloomberg Businessweek as the world's 1st, 5th, and 6th strongest banks in the world, respectively. It is home to the headquarters of 3 Fortune Global 500 companies, the highest in the region. The nation's best known global companies include Singapore Airlines, Changi Airport, and the Port of Singapore, all of which are among the most-awarded in their respective fields. Singapore Airlines was ranked as Asia's most-admired company, and the world's 19th most-admired company in 2015 by Fortune’s annual "50 most admired companies in the world" industry surveys. Other awards it has received include the US-based Travel + Leisure’s Best International Airline award, which it has won for 20 consecutive years. Changi Airport connects over 100 airlines to more than 300 cities. The strategic international air hub has more than 480 World's Best Airport awards , and is known as the most-awarded airport in the world. Over ten free-trade agreements have been signed with other countries and regions. Singapore is the second-largest foreign investor in India. It is the 14th largest exporter and the 15th largest importer in the world. Tourism Tourism is a major industry and contributor to the Singaporean economy, attracting 18.5 million international tourists in 2018, more than three times Singapore's total population. Singapore is the 5th most visited city in the world, and 2nd in the Asia-Pacific. In 2019 tourism contributed directly to about 4% of Singapore's GDP, down from 2016, when tourism contributed, directly and indirectly, to around 9.9% of Singapore's GDP. Altogether, the sector generated approximately 8.6% of Singapore's employment in 2016. In 2015, Lonely Planet and The New York Times listed Singapore as their top and 6th-best world destinations to visit, respectively. Well-known landmarks include the Merlion, the Esplanade, Marina Bay Sands, Gardens by the Bay, Jewel Changi Airport, CHIJMES, National Gallery Singapore, the Singapore Flyer, the Orchard Road shopping belt, the resort island of Sentosa, and the Singapore Botanic Gardens, Singapore's first UNESCO World Heritage Site. The Singapore Tourism Board (STB) is the statutory board under the Ministry of Trade and Industry which is tasked with the promotion of the country's tourism industry. In August 2017 the STB and the Economic Development Board (EDB) unveiled a unified brand, Singapore – Passion Made Possible, to market Singapore