Persecuted Catholics
They took off the iron grille and saw a hole big enough for a small person to crawl through. It led to a cellar that looked like a chapel! They asked historians about it and found out that it dated back to the 18th century. The room is believed to be a hidden Catholic Church when Catholics would get persecuted.
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Hidden Room
In 1963, this homeowner was renovating the house and knocked down a wall only to find a hidden room behind it. This was exciting, but then he found one more and then another… He discovered an entire underground city! Derinkuyu is easily one of the strangest archaeological findings of the 20th century. It was an ancient city composed of underground tunnels that housed Hittites.