一个洞，什么都没有。但是故事可以知道一下。

Legend of the Seven Sleepers

The outline of the story is that during the persecutions of the Roman emperor Decius, around 250 AD, seven young men were accused of Christianity. They were given some time to recant their faith, but instead gave their worldly goods to the poor and retired to a mountain to pray, where they fell asleep. The emperor, seeing that their attitude towards paganism had not improved, ordered the mouth of the cave to be sealed. Decius died in 251 and many years passed during which Christianity went from being persecuted to being the major religion of the Roman Empire. At some later time — usually, during the reign of Theodosius II (408 - 450) — the landowner decided to open up the sealed mouth of the cave, thinking to use it as a cattle pen. He opened it and found the sleepers inside. They awoke, imagining that they had slept but one day. One of their number returned to Ephesus. He was astounded to find buildings with crosses attached; the townspeople were astounded to find a man trying to spend old coins from the reign of Decius. The bishop was summoned to interview the sleepers; they told him their miracle story, and died praising God.