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In page Dubai International Airport:

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The concourse includes one 4-star hotel and one 5-star hotel, first- and business-class lounges, and duty-free areas. The total built-up area is 540,000 m2 (5,800,000 sq ft).[7] The concourse allows for multi-level boarding and boasts the largest first and business class lounges in the world. Each lounge has its own dedicated floor offering direct aircraft access from the lounges. The total amount of retail space at the concourse is 11,000 m2 (120,000 sq ft), and there is also a total of 14 cafes and restaurants.[citation needed]