Laguna Madre, Coastal lagoon in Tamaulipas, Mexico

Laguna Madre is a shallow coastal lagoon in the state of Tamaulipas, running along Mexico's Gulf coast and separated from open water by a chain of barrier islands. The water stays very shallow across most of the lagoon, and the bottom is largely covered by seagrass beds that support a wide range of wildlife.

The lagoon was designated a Ramsar site in 2004, which brought it under the protection of an international convention focused on preserving wetlands of global importance. Before this recognition, it had long served as a fishing ground and seasonal refuge for migratory birds moving along the Gulf coast.

Local fishing communities along the shores still use traditional methods passed down through generations, and their small boats are a common sight on the calm water. Watching them work gives visitors a direct sense of how the lagoon has shaped daily life in this part of Mexico.

The lagoon can be visited at any time of year, but the months between February and April tend to be the best for watching migratory birds as they gather in the shallows. Kayaking is a good way to move through the protected waters, and the flat terrain along the shores makes walking easy for most visitors.

Laguna Madre in Mexico and a lagoon of the same name in Texas form the only pair of sister lagoons on either side of a national border in the world. This rare geography means that birds crossing between the two countries often use both water bodies as part of the same journey without any break.