Located where the Caloosahatchee River spills into the Gulf of Mexico, most of Fort Myers' activities are centered around the water—including relaxing on the white sand beaches, fishing, and boating. The Harborside Event Center in Fort Myers offers a live entertainment venue for a variety of performances. Visitors to the city can also see the winter homes of Thomas Edison and Henry Ford. Nearby Naples offers a similar coastal retreat, with the added bonus of exclusive hotels and resorts, 35 golf courses, numerous shops and tours of the Everglades. Another treat in the Greater Fort Myers area is a visit to Marco Island, the largest of Florida's Ten Thousand Islands. The Calusa Nature Center and Planetarium in Fort Myers provides a venue for visitors to enjoy the natural world, both terrestrially and in the cosmos. Sanibel is home to the Old Schoolhouse Theater, a rennovated one-room school house that today features live performances.