Take this kayaking tour to see the magic of bioluminescence. The waters just off the Gulf of Nicoya contain a type of algae that glows in the dark.

This type of algae is very picky about where it lives — you’ll only find it in warm water lagoons that connect to the sea via a narrow channel. They respond to any type of movement, and you can stick your hand in the water to make them shimmer. Fish also set off the algae, and as you watch the water you’ll see different patches of blue-green light up under the stars.

Your tour begins at sunset, and the guide will debrief you on your route before you get in your kayak. It’s easy to navigate around these calm waters — no worries if you don’t have experience. Wear a life jacket, and make sure to ask your guide if you have any questions.

The tour is an hour long and there is a maximum number of 12 participants. It’s best to take the tour when the moon is new, ensuring a dark sky and maximum bioluminescent glow.