The ruins of the Hinterhaus Castle originate from the 12th century. The castle dates back to the time of Kuenringers rule when it served as a strategic stronghold. From here they were able to rule the entire Wachau valley. Touring the ruins with the famous Red Gate gives visitors a good impression of what medieval defence methods were like. The ruins still offers visitors a fantastic view of the Danube river even today.
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.