small circular volcanic crater - lake nemi or 'diana's mirror', genzano di roma, lazio region, italy.

background beautiful blue caligula circular coast crater diana nemorensis 39aph39 mirror edge emperor europe european famous festival forest roma goddess green hill historical holiday italian italy lake landscape lazio mountain natural nature nemi nemoralia panorama panoramic park scenery sky small tiberius tourism town travel vacation valley view village volcanic water genzano