The St. Augustine Lighthouse located in a town by the same name is one of the most haunted places on earth according to visitors. The Lighthouse hosts several specters within it's walls and if you visit you may just experience some hair-raising events like young girls giggling in the nearby woods, the smell of cigar smoke, footsteps on stairs, and a figure standing where no guest or staff can readily go...

Sources:

Ghostsandgravestones.com

St. Augustine - Wiki

www.staugustinelighthouse.org

St. Augustine Lighthouse - Wiki

Ghostcitytours.com

Sighosthunters.com

Staugustine.com