Macau is about 45 minutes away via ferry. You can ride a Ferry via two major terminals in Hong Kong. The Hong Kong - Macau Ferry Terminal and Hong Kong - China Ferry Terminal have regular trips to Macau. The usual price would cost HK$170. Once in Macau, you'll get to see historical sites, and ultra-complex Casinos!
It was definitely worth the visit. Here are some photos I have taken in Macau and in Hong Kong using GE X5