We live in an amazing world, full of astronomical, geological, and environmental phenomena. What do you recommend we check out in it?
Whether it's a place (perhaps Belize's Great Blue Hole) or an event (perhaps the Aurora Borealis), whether it's something you saw locally or something you had to travel far to catch a glimpse of, we want to know about the most amazing natural wonder that you've seen.
Tell us in the comments (with a picture, please!) what it is, where you found it, and what makes it so worth going to see.
Image: Aurora Borealis, seen in Norway / Frank Olsen.