texture of the interior of the lapa de santa margarida cave in arrábida, setúbal portugal

texture interior lapa santa margarida cave arrábida setúbal portugal colors serra passage undergrounds mountain travel recreation activity destination history stone rocks scenic hiking nature portugal cavern design pattern geologic formation adventure mineral illuminated grotto geological geology black exploration dark deep saint margaret cave margarida lapa inside interior lowlight colors colorful textured texture range portuguese reserve park natural serra europe setubal sesimbra arrabida