The arch's colours
From the spring minerals.
Leandro Kibisz — CC BY-SA 4.0 · Danskubr (enwp) — CC BY-SA 2.5 · Lucas Gentili — CC BY-SA 3.0
Puente del Inca is a natural rock arch over the Las Cuevas River at 2,744 metres in the Andes, near the entrance to Aconcagua park. Ice and hot springs made it together: glaciers left piles of debris, mineral-rich spring water crusted them into a solid mass, and the river carved the opening beneath. Its yellows, oranges and reds come from sulphur and iron in the water. Charles Darwin visited and sketched it in 1835. In the early 20th century a large spa resort stood beside it, reached by the Transandine Railway, whose old station still stands and now houses a mountaineering museum open in summer; the old bath buildings under the arch are abandoned. The bridge is seen from a viewing platform; walking on it or going down to the baths is not allowed, to protect it and for safety. It is a stop on the road to Aconcagua, so the two make one day trip from Mendoza.
From the spring minerals.
A mountaineering museum.
Beneath the arch.
Puente del Inca village, National Route 7, Mendoza province
No. Walking on it and going down to the old baths are not allowed, to protect it and for safety; it is seen from a free viewing platform.