Temperature; +25C Wind; 0.0 m/sec Rain; Drizzle

THINGS THAT WENT WRONG;

a. Bloody guide was switching the lights on and off so fast that I had only few second per shot
b. Sweat seriously compromised transparency of the glasses
c. Had no filter on lens, used hand & hat to protect it from water drips
d. Tripped over some rock in the dark and almost pierced my belly with tripod
e. Couldn't use flash because of halos due to the moist and damp air, operated at very slow speeds
f. WB was adjusted in every hall, turned to be a nightmare
g. Lost right shoe after the fall and found it only on the way back, walked 1.5 km bare foot...

The Grutas de Cacahuamilpa National Park in Guerrero, Mexico, is best known for the Grutas de Cacahuamilpa Caverns, which are one of the largest cave systems in the world. It is also home to the Grutas of Carlos Pacheco, a smaller system, as well as two subterranean rivers which have carved out tunnels in the rock.

This is the best-known cave system in Mexico, and the most popular for spelunking. It is a "live" cave system, meaning that groundwater still filters down into it, and that the formations there are still growing. Inside the cavern system are ninety large "salons" separated by large natural rock walls and connected to one another via a central gallery. However, only about twenty of these are fully explored and open to the public.
The publicly-open portion is essentially a two-km-long, level passage of linked “salons” or borehole openings. These salons average about forty meters wide, and vary in height from twenty to 81 meters. Most have names which reflect the major formations found in them such as the Goat Salon, the Throne Salon and the Cathedral Salon. All the openings numerous rock formations growing from both the ceiling and the floor. One of the drier salons has been dubbed the “Auditorium”. It has a large flat floor and has been outfitted with seats. It is rented out for events, and has been the site for a number of concerts.