Visit Pulpi Geode
Legendary helpful member
For those that haven’t done it yet, I can recommend a visit to the giant Geode at Pulpi, near San Juan de Los Tereos. Entrance is 22€ and you’ll need to book a couple of months in advance to get the time slot you want. They cater for a tour group of up to 12 people and run a tour every 30 minutes. The tour takes about 90 minutes.
The mine where the Geode is situated is a Silver / Lead / Iron mine and you’ll get a full tour of the workings, taking in the pillars and chambers that were blasted and cut. Then you’ll descend 55 metres down to the Geode itself and be able to put your head and upper body in and see the worlds largest single Geode (Mexico is a larger Geodic formation BUT is split across multiple caves)
for 3€ if required you can get the audio phone in English.
Fabulous experience, well worth a visit
EDIT 19/12/2022 - added link to booking page