Downtown (El Centro) is the actual backbone of Cancún. What it lacks in history, it makes up for being a true melting pot — an exciting mix of the old traditional Mexico and an ultra-modern urban sprawl. Avenida Tulum, the main street, passing through the heart of the city, is easy to reach by public transport. The street is lined with shops, cafés, bars, and restaurants. Be sure to stop by Parque de las Palapas, on the market square, where locals come to chat and watch the entertainment provided by various local groups. The lively atmosphere and the sound of Mexican music are infectious, and any worries will quickly be postponed to "mañana." Browse around the artisan stalls and try some of the local sweet delicacies or visit the "Hippie Market" around the corner. In the evenings, the place to be is Avenida Yaxchillan with its lively restaurants and bars, popular with locals and tourists alike.

Puerto Cancún is a mixture of residential, commercial, and tourist areas. An 800-acre upscale development next to the ocean featuring a large marina, a golf course, a waterside promenade with a luxurious outdoor shopping complex, eateries, and cafés, as well as hotels.

Built in the 1360s by Moorish Muslim kings and surrounded by lush gardens, Alcázar is a spectacular palace still used by the royal family, making it the oldest royal palace still in use in Europe.

The historic forts of Al Jalali and Mirani date back to the 16th century, and (although closed for entry to the general public) define the cityscape of the Omani capital. The forts were formerly used as defence fortresses and were constructed by the Portuguese during the colonial period. Come at sundown to capture the best views.