This is a peña: a very big stone that hasn't been cut, in its natural state.
Cuando un monte está formado por muchas rocas grandes, también le llamamos peña.
When a mountain is formed by many big rocks like the one in the picture, we also call it peña.

Esta es Peña Trevinca, en la provincia de Zamora, en España.
This is Peña Trevinca, in the province of Zamora, Spain.
This is Peña Trevinca, in the province of Zamora, Spain.
Sin embargo, la palabra peña se puede utilizar también con otros significados:
However, the word peña can be used with other meanings:
However, the word peña can be used with other meanings: