Of these, the most unique is probably "seabed strolling," which you can only find in Palau, Guam, Saipan, Thailand, and Bali. A special mask, invented in Japan, allows one to go down to depths of three to five meters without scuba gear or special training. Although it is not cheap (US $ 80 a pop) business is still booming.
這種日本發明的特殊頭罩讓人無須受水肺潛水訓練，便可沉到三至五公尺深的海底欣賞魚群、珊瑚礁，與二次大戰日本戰機殘骸，所以雖然嘗試一次就要八十美元，卻也生意興隆。