Iao Valley is a lush, green valley located on the island of Maui in Hawaii. It is part of the Iao Valley State Monument, which features stunning landscapes, including the iconic Iao Needle, a steep rock formation that rises 1,200 feet above the valley floor. The area is rich in history and was once a significant site for ancient Hawaiian battles. The valley is known for its diverse plant life and vibrant ecosystems, making it a popular destination for hiking and nature walks. Visitors can explore various trails that offer breathtaking views of the surrounding mountains and streams, as well as learn about the valley's cultural significance to the Hawaiian people.