The best souvenirs from an expedition cruise aren't T-shirts, they're experiences that fit a nature lover to a T

We spent the morning hiking the rugged canyons and ridges of Espíritu Santo Island, a protected marine park off the eastern coast of Baja. In the afternoon we snorkeled and kayaked the turquoise waters of its bay. Finally, in the evening, 40 of us, all passengers sailing aboard the National Geographic...