Tucked away in the ahupuaa of Kailua lies Kawainui Marsh. Over 4000 years ago, this marsh was an inland sea, which later became a sandbar. Eventually, that sandbar turned into the town of Kailua that we know of today. Ancient Hawaiians once utilized Kawainui as a freshwater fishpond. Today, state and federal personnel are working together to restore the surrounding habitat. Kawainui is home to four endangered species of marsh birds, including the aeo, or Hawaiian stilt. The gravel trail isn’t much of hike, but it is an experience. Keep your eye out for the endangered birds, gawk at Mount Olomana, and bask in the quiet setting.