Reservoir re-housed, historical artifacts moved or rare environments relocated. Examples include the temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt), the relocation of the village of Capel Celyn during the construction of Llyn Celyn, and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto. Construction of a reservoir in a valley will usually need the river to be diverted during part of the build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by
Abu Simbel temples There are depictions of Ramesses and Nefertari with the sacred boats of Amun and Ra-Harakhti. This hall gives access to a transverse vestibule in the middle of which is the entrance to the sanctuary. Here, on a black wall, are rock cut sculptures of four seated figures: Ra-Horakhty, the deified king Ramesses, and the gods Amun Ra and Ptah. Ra-Horakhty, Amun Ra and Ptah were the main divinities in that period and their cult centers were at Heliopolis, Thebes and Memphis respectively. It is believed that the axis of the temple was positioned by the ancient Egyptian architects in such