Mauna Loa is one of two volcanoes within Hawaii Volcanoes National Park. The other is Kilauea. It is the most active volcano in the world. Red-hot liquid rock, or lava, has continuously flowed from Kilauea since 1983. Most of the time, the lava appears to move peacefully toward the ocean. But it is not as peaceful as it seems from a distance. In 2014, the lava flowed through one small town on the island. It slowly covered the town, blocking and destroying roads. Nothing can stop the lava of Kilauea. When the lava reaches the ocean, its fierce heat produces steam. The lava is so hot that it continues to burn underwater. It cools and hardens over time, creating new land. This volcanic action is what formed, and continues to form, the Hawaiian Islands. That volcanic action is one of many unusual features at Hawaii Volcanoes National Park.