Dubai is the most populous city in the United Arab Emirates (UAE). It is located on the southeast coast of the Persian Gulf and is the capital of the Emirate of Dubai, one of the seven emirates that make up the country. Abu Dhabi and Dubai are the only two emirates to have veto power over critical matters of national importance in the country's legislature. The city of Dubai is located on the emirate's northern coastline and heads up the Dubai-Sharjah-Ajman metropolitan area. Dubai is to host World Expo 2020.
Burj Khalifa is an 828 metres (2,717 ft) high skyscraper in Dubai, and the tallest man-made building in the world. The tower was inspired by the structure of the desert flower named as Hymenocallis. It was constructed by more than 30 contracting companies around the world with 100 nationalities of workers. It is a building icon.
On February 14, 2013, the Dubai Miracle Garden, a 72,000-metre (236,000-foot) flower garden, opened in Dubailand. It is the world's largest flower garden. The garden has a total of 45 million flowers with re-use of waste water through drip irrigation. During the summer seasons from late May to September when the climate can get extremely hot with an average high of about 40 °C (104 °F), the garden stays closed.