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
Great and Small Temples of Abu Simbel is roughly on an East-West axis. However, it is slightly off this axis in order to accommodate for this phenomenon. For about twenty minutes every February 22 and October 22, the sun shined through the temple to light up the statues of the gods in the sanctuaries. Some people suggest that these dates correspond to the birth and coronation of Ramesses II. The Small Temple at Abu Simbel was dedicated to the goddess Hathor of Ibshek, the ancient name for an area in present-day Sudan more commonly called Faras (although it is now submerged under Lake Nasser). The Small Temple