Camping Gruta India — also known as Complejo Municipal Gruta India or Gruta/Cueva Tres de Mayo — is a municipal protected natural area situated on Arroyo 3 de Mayo, roughly 6. 5–7 km from Ruta Nacional 12 near the town of Garuhapé, Misiones.

The access road from the highway is primarily packed gravel (tosca).

The centerpiece is a sandstone cave measuring approximately 36 meters deep and 64 meters across its face, which has yielded significant archaeological finds and is considered one of the oldest known archaeological sites in Misiones.

The complex offers camping areas, cabins, a motorhome zone, covered barbecue kiosks (quinchos), picnic tables with grills, potable water, restrooms with showers, and a small snack kiosk.

Natural highlights include the arroyo itself, a natural swimming hole, waterfalls, walking trails, boardwalks, and viewpoints, with wildlife such as butterflies, birds, and Argentine black-and-white tegus commonly spotted.

The park enforces strict environmental rules: no pets, no hunting, no fishing, and low music levels are required throughout.