The Yonaguni Monument

Take a journey across land, sea, and time to hear about a mysterious underwater city in Japan. Situated only about 100 meters offshore and about 50 meters under the water are a collection of structures that not only evaded detection for thousands of years, but also left academics and archaeologists scratching their heads as to who or what put them there. Natural or man made? Could this monument hint at a lost continent? Tune in to find out!