South Korea's tropical island paradise will enchant you with its sandy beaches, swaying palm trees and amazing volcanic landscape. Need a break from your beach towel? Waterfalls, museums, folk villages, scuba diving, hiking and festivals galore will keep you busy. Explore the colorful coral and sea life with a scuba dive off the coast of laid-back Seogwipo. Take an underground stroll through the world’s longest lava-tube cave at Manjanggul.