Haleakala's last display can be seen on Maui's southeast shore at La Perouse Bay. Scientists estimate that in 1790 Haleakala erupted to form the jagged lava rock coastline. Now there is a monument and
La Perouse Bay's jagged lava coastline formed during Haleakala's last eruption, estimated around 1790 — the same year Kamehameha I's forces fought in Iao Valley nearby. © Kirt Edblom from Kihei, Hi, United States, CC BY-SA 2.0, via Wikimedia Commons

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