Persecuted Catholics
They removed the metal grille and noticed a hole just large enough for their niece and his friend to go through. On the other side was a basement that looks like a chapel. The couple invited historians and asked about it and discovered that the room dated back to the 1700s. It is believed that the place was utilized as a secret Catholic Church in a period when Catholics were abused and executed.
Hidden Room
In 1963, a homeowner was doing repairs on his home when he hit down a wall and came over a hidden room. While this alone is interesting, imagine how thrilled he was to discover another and another. This man accidentally found a whole underground city. Derinkuyu is one of the rarest and impressive archeological findings of the 20th century. The ancient city was built by a massive system of underground tunnels that homed the Hittites.