Bored of surfing? Try bore surfing.

"I'm bored of surfing in the ocean," said no one ever. But let's entertain the weird and wonderful anyway. In this episode, we take a detour from the sea and dive (well, paddle) into the strange world of bore surfing—where waves charge up rivers, not toward the shore. These rare tidal bores happen in only a handful of places on Earth and can deliver the longest wave rides imaginable—up to an hour long. Yes, seriously.