This 18th-century Baroque chapel was built over a hermitic Visigoth grotto on the Douro riverbanks. It is located on the Machado Route and inside you can see impressive frescos that narrate the life of San Saturio, a hermit from a noble 5th-century family that was canonised when he donated all his goods to the poor and went to live as an anchorite in this grotto where you can find his tomb and remains.
References:The Temple of Edfu is one of the best preserved ancient shrines in Egypt. It was built in the Ptolemaic Kingdom between 237 and 57 BC.
Edfu was one of several temples built during the Ptolemaic Kingdom, including the Dendera Temple complex, Esna, the Temple of Kom Ombo, and Philae. Its size reflects the relative prosperity of the time. The present temple initially consisted of a pillared hall, two transverse halls, and a barque sanctuary surrounded by chapels. The building was started during the reign of Ptolemy III Euergetes and completed in 57 BC under Ptolemy XII Auletes. It was built on the site of an earlier, smaller temple also dedicated to Horus, although the previous structure was oriented east–west rather than north–south as in the present site.