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
Rock relief parts of the country, generally those away from the main centres of population, as Abu Simbel was. There are a group of figures surrounding an image of Mentuhotep II, who died in 2010 BC and was the first pharaoh of the Middle Kingdom. Before they were cut away and moved, the colossal figures outside the Abu Simbel temples were very high reliefs. Other sculpture outside temples cut into the rock qualifies as rock reliefs. The reliefs at Nahr el-Kalb commemorate Rameses II, and are at the furthest reach of his empire (indeed beyond the area he reliably controlled) in modern