Go to coordinates X7392, Y16151 to find a hot air balloon. Note: You can also find an armor piece near the balloon. You can ride the balloon by shooting off the sandbags and steer it by waking in the basket. Note: Unlike other vehicles, the hot air balloon can be used to fly over the Lost island without getting destroyed.
Mile High Club: Find a strip club suspended by dual blimps at coordinates X29584, Y11435.