Photo of the Day
A blue crab with its claw raised.
April 15, 2026 | Under the River
A blue crab fishes in the current of the Sistema Ox Bel Ha underground river system near Tulum, Mexico. Sistema Ox Bel Ha—or "Three Paths of Water" in Mayan—contains more than 160 cenotes. As National Geographic reported in 2025, these natural water-filled sinkholes often house historic artifacts and endangered aquatic species. In southern Mexico, they also serve as the only freshwater source to millions of people in the region.
