Kawainui Marsh
Kawainui and Hamakua Marsh is the largest wetland in Hawaii. It is home to several endangered and endemic waterbirds and other creatures. Plans are in the works to build a visitor information center and walking trails. In the meantime, visitors can enjoy the marsh by parking at Kaha Park and walking along the two-mile levee that runs from the park to the Pali Highway.

Visitors can also contact Ahahui Malama I Ka Lokahi, a grassroots service organization, to find out about educational tours and service projects at the marsh.

Nearby Ulupo Heiau, a sacred site for Native Hawaiians, is also worth a visit.