Nature spirits who lived in the sea, rivers and forests. They were beautiful girls and were of different sorts: Nereids (water), Oceanids (oceans), Naiads (sea), Oreads (mountains), Hamadryads (forests) and Dryads (trees).Even though the nymphs were full of beauty and grace, they could also be very dangerous, inflicting madness and death. There are many stories about young men being taken by the nymphs.