Towangseong Waterfall or Towangseongpokpo (Korean: 토왕성폭포; lit.

hearty earth fortress waterfall[1]) is a waterfall in Seoraksan, Sokcho, Gangwon Province, South Korea.

At a total combined length of 320 m (1,049 ft), it is the longest waterfall in South Korea.

[1] An alternate name for the waterfall is Singwangpokpo (신광폭포; 神光瀑布).

The "Towang" portion of the waterfall's name, meaning "hearty earth", comes from a belief that rock formations such as the ones found at the waterfall are only possible when there is much earth energy (as in the traditional five elements).