I found a fossil near the shore of Sagres, Portugal. A quick (and probably not very reliable) google search indicates that there are Jurassic, Cretaceous, Miocenic, Pleistocenic and current formations over here, if that is any help at all.
It has a snail-like shape and was found in a quite strange way: On top of a huge boulder, where all the rock around it had eroded, stood this fossil, in a pedestal. For some reason it survived the elements, but not the rest of the rock itself. Because of that, it has a wonderfully flat base that required no adulteration to stand beautifully amongst my other fossils.
Enclosed are some pictures so that one of you may help me find out what it is. Even a name would be amazing!