Penitentes, or nieves penitentes, are snow formations found at high altitudes. They take the form of elongated, thin blades of hardened snow or ice, closely spaced and pointing towards the general direction of the sun.
Field of penitentes (1.5–2 metres or 5–7 feet high); upper Rio Blanco, Central Andes of Argentina
Small penitentes in the summit crater of Mount Rainier
Penitentes near the summit of the Agua Negra Pass on the border between Chile and Argentina
The Stone Forest or Shilin is a notable set of limestone formations about 500 km2 located in Shilin Yi Autonomous County, Yunnan Province, People's Republic of China, near Shilin approximately 90 km (56 mi) from the provincial capital Kunming.
Main entrance to the Shilin Stone Forest
Image: Shilin, Yunnan 24611
Image: Shilin, Yunnan 24747