Fodor's Expert Review Castolon Visitor Center

Temporarily housed in the old Officer's Quarters building following its destruction during a 2019 wildfire, this visitor center in the Castolon Historic District contains hands-on exhibits of fossils, plants, and implements used by the farmers and miners who settled here in the 1800s and early 1900s. There's also an old adobe gallery displaying poster boards explaining the U.S.–Mexico "transparent border."