Puelén
This small town invites you to visit the Cueva de Halada, a mysterious cavern created by volcanic lava. Its entrance hole is 1 metre in diameter, and inside it, the galleries exceed 350 metres long all combined. This private property harbours the El Escorial volcano, which can be visited through a signposted, low-difficulty mountain trail (850 metres m.a.s.l.).
To visit the place, learn about its access gates and road conditions, contact the Municipality of Puelén and hire local guides.