cholla cactus with unripe fruit, Isla San Francisco, Sea of Cortez, Baja California Sur, Mexico.

Expedition leader, Kevin Martin, and passenger Irene Wicklund, Isla San Francisco, Sea of Cortez, Baja California Sur, Mexico.

Safari Quest passenger Irene Wicklund displays a salt-encrusted hard rock "hamburger" at the salt flats on Isla San Francisco, Sea of Cortez, Baja California Sur, Mexico.