For something a little less ordinary, sign up for this unique boat trip. Our destination is a luminous lagoon just outside Falmouth, where you'll witness a natural phenomenon that only happens in 4 places on the planet :the water here is full of phosphorous particles that glow a brilliant blue-green when disturbed. There are so many, the fish swimming by look like lit-up lanterns. The captain will drop anchor once you arrive in the bay, and give you lowdown on the lagoon. And, of course, you can jump in and experience it up close.