No One Knows What’s Behind This Strange Ancient Door

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Are you ready to visit the most mysterious places hidden in the mountains? Our first stop will be in Switzerland: standing at the door of the castle, you can’t really believe what you see: a 13th-century fortress built entirely of stone. On the outskirts of Çorum in Turkey, you’ll find a valley filled with old overgrown mountains and see the beginning of the trail you’re about to hike. The huge door is a massive arched stone that blocks the entrance to a hidden building. Experts think it has existed since the second century BCE. But let’s hurry up – we have many more places to explore!

Credit BRIGHT SIDE