This is the cave of the Seven Sleepers situated in Jordan. This cave pertains to the Ashaab-e-Kahf (Companions of the Cave) mentioned in the Holy Qur’an. To learn more about the Ashaab-e-Kahf click on the following link: The Companions of the Cave
"You will not find people who believe in Allah and the Last Day taking as their friends those who oppose Allah
and His Messenger, even though they be their fathers or their sons or their brotheren or their kinsmen."
[Surah 58, Verse 22]