The Oldest House In Miami The Barnacle, a real historical jewel in the heart of Coconut Grove, is one of the oldest buildings in Miami-Dade County standing in its original location! Today, the Barnacle Historic State Park is a popular spot for both history enthusiasts and those looking for a beautiful view. It is open to the public, offering a unique experience to go back in time to the history of Coconut Grove and all of South Florida. Aside from guided tours, there are concerts, yoga classes, movie screenings, picnic dates and more events to choose from at the site. Or you can simply lay back on the lawn and enjoy the same view as Munroe did with his family back in the early 1900s. The Barnacle Society Inc., a nonprofit volunteer organization, works all year to set up fun programming and preserve the historic state park.