(2) Exemple de destination n°1 : «The sandpit :  8 million years ago, there was a sea covering the whole Paris plain. When it moved to the English Channel, the sea left sediments behind it. In this sandy area, one can find sandstones and limestones with a very strange bumpy shape, and billion of shells going back to the Bartonian age (…) Difficulty: * Duration: 15 minutes Distance: 7 km Transport : car – France, close by Paris, 49.122331,2.559483 »

(2) Exemple de destination n°2 : « The triangle is situated on a mountain between Palermo and Capaci, in Sicilia. It’s a quarry owned by a company who produces cement. The rocks are transported down the mountain where the cement is then produced. It’s forbidden to go there because it’s a private site; However, you can try to get in asking permission to the workers or hiding from the security guard (…) Difficulty: **** Duration: 3 hours Distance: 10 km Transport : City-scooter – Italy, close by Palermo, 38.16849,13.259962»

(2) Exemple de destination n°3 : «The Swamp : this is an old military base that was occupied by Russian army until 1991. It’s now a very large swamp, at the heart of an Estonian nature reserve. You can experience a large variety of grounds, from the wet land where your feet will sink deeply in the mud, to the dry land where trees will grow high. (…) Difficulty : *** Duration : 2 hours Distance : 6,6 km Transport : car, walk – Estonia, close by Tallinn, 59.387157,25.608294»