The Marietas Islands are a group of small, uninhabited islands located off the coast of Nayarit, Mexico. They are part of the Marietas Islands National Park, which was established to protect the unique ecosystems and diverse marine life found in the area. The islands are known for their stunning landscapes, including hidden beaches and rocky cliffs. These islands are also famous for the Hidden Beach, a secluded spot accessible only through a tunnel. The Marietas Islands are a popular destination for eco-tourism, offering activities such as snorkeling, diving, and birdwatching, attracting visitors from around the world.