Dubai is the most populous city and emirate in the United Arab Emirates (UAE), and the second largest emirate by territorial size after the capital, Abu Dhabi. Dubai is located on the southeast coast of the Persian Gulf and is 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 has a rich collection of buildings and structures of various architectural styles. Many modern interpretations of Islamic architecture can be found here, due to a boom in construction and architectural innovation in the Arab World in general, and in Dubai in particular, supported not only by top Arab or international architectural and engineering design firms such as Al Hashemi and Aedas, but also by top firms of New York and Chicago. As a result of this boom, modern Islamic – and world – architecture has literally been taken to new levels in skyscraper building design and technology. Dubai now boasts more completed or topped-out skyscrapers higher than 2/3 km, 1/3 km, or 1/4 km than any other city. A culmination point was reached in 2010 with the completion of the Burj Khalifa (Khalifa Tower), now by far the world's tallest building at 829.8 m (2,722 ft).
Tourism is an important part of the Dubai government's strategy to maintain the flow of foreign cash into the emirate. Dubai's lure for tourists is based mainly on shopping, but also on its possession of other ancient and modern attractions. As of 2013, Dubai was the 7th most visited city of the world and the fastest growing, increasing by a 10.7% rate. Dubai is expected to accommodate over 15 million tourists by 2015. The emirate is also the most populous of the seven emirates of the United Arab Emirates. It is distinct from other members of the UAE in that a large part of the emirate's revenues are from tourism.