Abu Dhabi is an oven in the summer months, which is why most of the locals leave the city to tourists. Forget walking outside in July and August – save that for the (somewhat) cooler months from November to April/May. Metered taxis are abundant and will take you anywhere for a fair price. Bus n. 5 links the Marina Mall to Al Maryah Island, and bus 54 will take you from Al Zahiya to the Sheikh Zayed Grand Mosque. The free Yas Express is a handy shuttle bus that links all major sightseeing spots roughly once an hour on three different routes.