We had a great trip yesterday. It was well worth the visit and here's some info.
Estrella Blanca bus fare to the Grutas from Cuernavaca was $66. Entrance fee to the Grutas is $75. After a two hour guided tour of the caves, we paid $200 for a taxi to Taxco, a half hour drive. (Combis are also available.) Bus fare for the return trip to Cuernavaca from Taxco was $90.
Also recommend the trip up to the Cristo Monumental in Taxco: an impressive statue, and beautiful views of the valley below.
Shops, restaurants and parking
These amazing caverns are located 52 Kms. from Taxco on highway 166 in the State of Guerrero. The Grutas de Cacahuamilpa or cacahuamilpa Grottoes make for a fascinating excursion.
The Caverns were discovered in 1834 by Manuel Saenz de La peña and were decreed as a national park in 1937. Only 10 of the estimated 70 kilometers of passages have been explored so far. The highest of the explored chambers measures some 80 meters in height. The average height of the chambers is 40 meters. The cavern’s mouth measures 21 meters in height and 40 meters in width.
The park opens at 10:00 a.m. and closes at 5:00 p.m. everyday. The tour is throughout approximately 2 kilometers of the underground labyrinth and each tour lasts about 2 hours. I really recommend that you carry some water with you and comfortable shoes. At the visitor’s center there are restaurants, snack bars, and souvenir shops.