Thiorichia Beach, also known as the Old Sulfur Mines, is a hidden gem on Milos island in Greece. This historic site offers a glimpse into the island's industrial past, with abandoned buildings, rusty machinery, and tunnels where sulfur was once extracted. Visitors can explore the remnants of the old mines, take in the scenic views, and even relax on the nearby beach after their adventure. It's a unique and off-the-beaten-path experience that shouldn't be missed on a trip to Milos!