Tijuana Estuary Visitor Center is open to all visitors for free from Wednesday through Sunday. The Visitor Center answers questions or concerns and provides further information about the Tijuana Slough National Wildlife Refuge, Tijuana River National Estuarine Research Reserve, Tijuana River Marine Protected Area and Border Field State Park. Visitors can go to the estuary to learn about the more than 370 species of birds and endangered species that inhabit the area, the estuary's many habitats and how plants in the site get rid of salt they take in. The center has exhibits to learn about the estuary, a gift shop and binoculars that can be borrowed for sightseeing. Meetings, lectures and weekly nature and bird walks meet at the Visitor Center. Visit the TRNERR calendar to learn about the latest events.