if you have time to kill, i'd ferry to macau and hit up a sauna.
18, East, Sanado, Emperor i've tried and are great.
sanado has a special 20% off for the times you'll be in. leave before 6pm and get discount.
first boat from hkia to macau is at 10am
you could take the 4:30pm back, but thats in taipa.. (edit: both 10 and 4:30 embark/disembark at taipa, just take a cab from the ferry to the saunas)
http://www.turbojet.com.hk/eng/schedule/airport.asp
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Last edited by gmpink at 6-9-2012 09:54 ]