A series of lava-carved pools, channels, and submerged tubes makes floodwater churn as if the river were boiling. The same geology that creates the visual effect also makes the site dangerous; admire it from established overlooks and never enter the river during high flow.
Filed under roadside oddities: giant objects, odd monuments and things built for no clear reason.
Something wrong with this entry?
Source: hilo.hawaii.edu/news/kekalahea/where-to-go-in-hilo-boiling-pots