Egypt is located in northeast Africa and is bordered by Libya to the west, Sudan to the south, the Red Sea and Sinai to the east, and the Mediterranean to the north. The official language is Arabic, although many Egyptians also speak English and French. Around 85% of Egypt's population practices Islam, with Coptic Christianity making up the majority of the remaining population. Key aspects of ancient Egyptian culture included mummification, worship of gods like Ra and Osiris, and leaving elaborate tombs along the Nile River, such as in the Valley of the Kings.