To start I'd like to present you the calendar from ARSIP (Association pour la Recherche Spéléologique Internationale à la Pierre Saint Martin) in which a lot of members from our grotto (SC Avalon) participate through their work at the Réseau d'Anialarra. It contains some magnificient shots from the Pierre Saint Martin area in A3 format. Costs € 15.00
Belgium orders: click here
International orders: click here
The calendar from Speleo Projects is a real classic. It contains pictures from all over the world. As a bonus you will also get 24 coloured cave postcards. Price: €14.50
Belgium orders: click here
International orders: click here
Or if your more interested in a nice agenda containing caving pictures from all over the world, I can recommend this little book from speleo.pl at € 15.00 containting 53 caving pictures and a list of the 25 deepest and longest caves in the world.
Belgium orders: click here
International orders: click here
Remember: by buying any of these you support the community/groups behind it and help them finance new expeditions etc.