Dubai is a constituent emirate of the UAE, or United Arab Emirates. Its capital city is also named Dubai. It is the largest city within the federation, housing nearly 90 percent of the emirate's population.
The city of Dubai is home to the world's largest tallest building and freestanding structure, the Burj Dubai tower. Construction of the tower was one of many transportation and construction projects that have been initiated in the 21st century to promote tourism in the United Arab Emirates. The neighboring emirate of Abu Dhabi, which borders Dubai to the south and west, has also initiated projects to encourage foreigners to visit the UAE.