Wailua River State Park and the Wailua Complex of Heiaus, which it includes, are located on the eastern side of the Hawaiian island of Kauai. The park consists primarily of the Wailua River valley, which is the only navigable river in Hawaii. Visitors to this park can kayak, take riverboat cruises and explore the rainforest. Even motorboats and water skiing are permissible on the river.

Wailua was the land of the ali'i (kings) and was one of the largest ahupuaʻa (subdivisions) on Kauai. It is said that King Kaumuali'i's favorite place to live was in Wailua. There are Hawaiian heiaus starting from the mouth of the river all the way to the summit of Mt.Waialeale. The huaka'i po (Ghost Warriors) are said to walk ancient trails along the river at night up to Mount Waiʻaleʻale. Wailua has many legends about it and was once home to many Hawaiians. Sources