Designed to imitate the cuesta rock formations in the area, this stunning glass and aluminum panelled structure is worth a visit just to admire the architecture. Exhibits focus on the ecology and history of the Lanyang Plain (or Yilan Plain), an alluvial fan formed by the Lanyang River.
The museum is just south of Wai'ao at Wushih Harbour (where there are dolphin-watching tours as well as boats to Turtle Island). You can walk here from Wai'ao train station in 20 minutes. Just cross the street as you exit the station and head right along the boardwalk.