Sea glass can be beautiful and free keepsake from a beach visit, great for displaying or crafting. Here's where to look in ...

According to the sea glass rarity chart from realseaglass.com, the “ultra rare” tier of sea glass colors includes multi-colored pieces, orange, yellow, red, turquoise and teal.

NPR goes on a coast-to-coast hunt for treasure hiding in plain sight. Learn about sea glass and how to find it.