In less than 2 weeks we visited some stations on the peninsula Baja California (Sur). Especially the activities on and under the water have done to me and will remain for a long time in my memory!
That's it - Trip Overview
Beaches and diving at La Paz
Cabo Pulmo
Gray whales and turtles on the west coast

Mexico, especially the Yucatan Peninsula, sounds like a package holiday destination to many. But if you go on a tour with a rental car, there is much to experience. Diving in cenotes or climbing on pyramids? In the states Quintana Roo and Yucatan no problem :-)

That's it - Trip Overview
Yucatan's Cenotes - unique diving and snorkeling experiences
In the footsteps of the Maya
Las Coloradas and the flamingos of Rio Lagartos
Isla Holbox