In the North-West corner of the peninsula, you can clearly see the remains of the Chicxulub Meteor Impact Crater that is believed to have caused the extinction of the dinosaurs.
http://news.bbc.co.uk/1/hi/sci/tech/2837407.stm
http://www.jpl.nasa.gov/srtm/mexico.htm
http://news.bbc.co.uk/1/hi/sci/tech/2837407.stm
http://www.jpl.nasa.gov/srtm/mexico.htm
