I seriously have no idea what amateur divers are looking for when they dive underwater using a metal detector. Did someone drop an iPhone? Did a drone crash into the water? But whatever the reasons are, guess they're totally worth it if during a search expedition, you come across gold coins worth $1 million dollars.
Yes! That actually happened. 290 years after a Spanish ship sank off the coast of Florida, a diver found a stash of gold coins underwater from that era that is now worth a million dollars.
Check out the video where he realizes what he just found.