Puente del Inca, also known as "The Inca's Bridge," is a natural rock formation located in the Argentine Andes near the border with Chile. The site is notable for its unique geological formation and historical significance, as well as its stunning natural beauty.

The formation is a natural bridge spanning the Vacas River, which has eroded a path through the surrounding rock over time. The bridge is composed of a mix of ice and sedimentary rock, giving it a unique appearance and texture. The site also features a number of hot springs and geysers, which have been used for centuries for their purported healing properties.

The bridge is located along an ancient Incan trade route, and it is believed that the Incas used the bridge as a key crossing point. The area is also significant for its role in early mountaineering and exploration, with numerous expeditions to the region dating back to the late 19th century.

Today, Puente del Inca is a popular tourist destination, with visitors drawn to the site's natural beauty, history, and unique geology. The site is easily accessible by road, and visitors can explore the bridge, hot springs, and surrounding areas on foot or by horseback. The nearby Aconcagua Provincial Park also offers a range of hiking and outdoor activities, making Puente del Inca a popular stop on many outdoor adventure tours of the region.