The Monarch Butterfly Biosphere Reserve is located in the Mexican state of Michoacán, and is a protected area that serves as a wintering habitat for millions of monarch butterflies. Established in 1980, the reserve covers an area of approximately 56,000 hectares and is comprised of pine and fir forests, as well as meadows and wetlands.

Each year, between November and March, millions of monarch butterflies make the long migration from Canada and the United States to the reserve in search of a warm, sheltered place to spend the winter. The butterflies gather in clusters on the branches of the oyamel trees in the reserve, creating a breathtaking natural spectacle that attracts visitors from all over the world.

In addition to its importance as a wintering habitat for monarch butterflies, the reserve is also home to a diverse range of plant and animal species, including many species of birds, mammals, and reptiles. Visitors to the reserve can take guided tours, participate in educational programs, and enjoy hiking, camping, and other outdoor activities.