Hi Lydia, The Event De Jonquilles is a fine cave (if you can find it); it starts as a small hole in a wood, and drops about 40 m into a big passage, which in one direction leads to a crawl that we didn't bother with, but in the other direction leads to a lovely stream passage. I believe that the entrance can take a lot of localized run-off, so if you go there watch the weather (same applies to the stream I guess ? it's quite a big stream, and presumably responds to rain). (NB The obvious changing / parking area seems to be a local 'dogging' spot, and the sight of a mixed bunch of cavers getting changed seemed to cause some consternation to the local 'doggers' when we were there (that was 6 years ago)).
The Igue De Viazac is a much more serious undertaking, with a lot of pitches that descend to about 240 m; it starts as a big hole on a plateau. The rigging would make it suitable only for experienced SRT-ists. There is a 'delightful' wire traverse over a 'bottomless pit'. ALso, we encountered problems with bad air near the bottom ? I believe that this is found in a lot of caves in the area (including the one mentioned above).
The Igue de St Sol is a deep hole (~60 m) that leads to an enormous passage ? very impressive, but choked in both directions.
I daresay that you could get GPS coordinates if you Googled the names.
The Gouffre de Padirac show cave is also worth a visit
