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Interesting science museum that explores questions about how a meteorite slammed into the Yucatan coast right about here, creating the Chicxulub Crater while killing off almost all life forms much larger than a mouse and triggering the Ice Age.
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Progreso Pier
The 6-km pier, the longest in the world, due to the shallow water on the Yucatan coast, has made Progreso the most important port for the export of Yucatan's products and visiting cruise ships. By law, you can't enter the pier, but try to ask the Customs officials.
There is a small flamingo colony located here. If you don't manage to get to Celestún you might still be lucky and see a few here.
Because of the relatively long period of occupation, some pre-Columbian ruins are still visible here, right by the coastal road. The site consists of two plazas surrounded by numerous buildings, ten of them large. Especially notable are the Pyramid of the Crosses and the Pyramid of Masks. Today the location is a pilgrimage destination, due to a legend that the Virgin Mary once appeared here.