Nestled within the walls of San Marino's Stamp and Coin Museum lies a hidden treasure: a cavernous cistern dating back centuries.
This ancient water reservoir, carved into the rock, was part of a network of water supply systems that once sustained the growing population of San Marino.
Today, visitors can glimpse this fascinating piece of history through a glass window, providing a unique peek into the past.
Make sure to explore the museum's philatelic gallery on the second floor to uncover this hidden gem, a captivating reminder of San Marino's rich history.
