It involves footprints left behind 190 million years ago from different dinosaurs on some scattered rocks on the "Frana di Kas" area, the eastern-most part of the Marocche Biotope. At least one footprint is from a big herbivore, about 6-7 meters tall, while the other is from a carnivore. The footprints, discovered in 2000, aren’t very noticeable because the calcified rock, which makes-up a large part of Dro’s great glacial landslide, degenerates a centimeter every 1000 years due to Karst disintegration. A guided trail along the beautiful geological biotope, kept by the Tridentine Museum of Natural Sciences, takes you to the dinosaur’s footprints.