Just hire a plane/boat and go film this magical ice wall. If the can afford to purchase a $20,000 gyroscope, I'm sure they can find the money to go visit the end of the earth.
Yeah I was dying for someone to ask that. Like, this isn't a debate over whether God exists where it can never be falsified. If there's a giant ice wall at the edge of the world, then you can freaking go there and see it. It's not even like they have to go into space or to the bottom of the ocean. Sailing into the unknown is a thing that is done. Humans have been doing it for thousands of years. What's stopping them?