Isla Espíritu Santo
This large island off Baja California is one of the most biologically diverse places in the world. Certain animals—including
the black-tailed jackrabbit—can only be found here. Thirty-one marine animal species, such as sea lions and coral, inhabit
Be sure to: Paddle through Cueva Grande, or "Big Cave," where you can see the north and south points of the island. Watch for birds; blue- and orange-footed boobies call this secret spot home.
How to get there: Baja Expeditions from La Paz, Mexico; bajaex.com. For more info, visit nature.org/success/mexicoisland.html.