Wiñay Wayna (2650 m) (Quechua for "forever young", Hispanicized spelling Huiñay Huayna) is an Inca ruin along the Inca Trail to Machu Picchu. It is built into a steep hillside overlooking the Urubamba River. The site consists of upper and lower house complexes connected by a staircase and fountain structures. Above and below the houses the people built areas of agricultural terraces or andenes, which are still visible.

A camp site for hikers with the same name is located in the vicinity and is usually used as the last overnight camping site for hikers undertaking the classical Inca Trail.