The Swiss Jura is made largely of karst limestone and in many places has washed out in dark holes and chimneys small, medium-sized, and frequently gigantic. There's great sport to be had in seeking them out in the snow, darting up close for a snapshot, and backpedaling frantically, giggling in triumph.

Since the Dawn of the Century, we've been stumbling all about in the forests of the Jura on snowshoes, looking for these things and trying to talk Dr Pirri into plummeting down into some of them and waving cheerily back up at us for the perfect photograph. Our luck is holding so far.

Scientific and philosophical introduction	The lads resisting gravity as best they can, January 2002
Bedsprings to keep the cows out, Creux d'Enfer, February 2002	Dr Pirri surveying the depths near Grand Cunay, February 2002
Dr Pirri and hors de serie holes of spring 2002	Dr Pirri and a new crop of Jura holes, spring 2003
Dr Pirri achieving penetration, February 2004	Kristin scrambling back out again, April 2004
Kristin measuring the depth of a near miss, Dec. 2005	Dr Pirri peering into the Underworld again, January 2006
Holes in the forest of Grand Rolat, spring 2007	The Creux d'Enfer near Grand Cunay, June 2008
Autumn hikes, 2011

Very Big Holes in the Jura

La Glacière above St George	The Grande Baume du Pré d'Aubonne
The Glacière de St-Livres	The Glacière de Petit Cunay
	Holes of the Jura Introduction and scientific background Drs Pirri and Peck falling into small holes The search for more holes, Swiss Jura, spring 2002 The search for more holes: Grand Cunay, a real biggy The search for more holes 2002 & hors de série holes Some Jura holes try to swallow Dr Pirri, spring 2003 Limestone holes yawning before us, winter 2003-4 A few extremely interesting holes, winter/spring 2006 A hole in the forest of Grande Rolat, spring 2007 The Creux d'Enfer near Grand Cunay, June 2008 Autumn 2011 Very big holes: St George, Pré d'Aubonne, St-Livres, Petit Cunay, Chenuz
Grotte à Chenuz

Dr Pirri on the point of disappearing into a lovely great hole in the forest of Grande Rolat, February 2005.

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Feedback and suggestions are welcome if positive, resented if negative, . All rights reserved, all wrongs avenged. Posted 25 January 2002, revised 19 March 2012.