Last year during August the website geocaching.com had a challenge to find at least one cache on each day of the month. I did pretty well but didn't complete the challenge, sometimes because I couldn't get out and cache and sometimes because the cache I had aimed to do that day I couldn't find.
This year the challenge is a bit easier - one 7 need to be found but each one must be of a different cache type. Traditional caches will be easy to do but for me the most challenging is an earth cache - partly because there aren't that many near where I live and partly because the requirements for each cache can sometimes be a challenge to work out. However, knowing I was coming away to Switzerland I checked for caches near where I was going and was pleased to see that there was an earth cache at Trummelbach Falls (which I have visited before but never checked to see if there was a cache there).
The falls are a series of 10 glacier falls drawing the runoff from three mountains: Eiger, Mönch and Jungfrau. They are definitely worth a visit if you are ever in the area.
However, ear defenders may be helpful as it is very noisy with approximately 20,000 litres of water rushing down them each second!
I've also managed a couple of traditional caches while out here (including this genious one)
so have now earned two of the seven souvenirs.