Freestyle Music Park, South Carolina. Image from CoasterImage.com as seen on the Weburbanist and Clonehenge websites.
“This completely fabulous Stonehenge replica, playfully named Phonehenge, sits in the Freestyle Music Park (formerly the Hard Rock Park) in Myrtle Beach, South Carolina. It surrounds a large performance space in the British Invasion section of the park and is comprised of lots of red old-style British telephone boxes”. From Weburbanist.
You can also find details of this Park on the blog Clonehenge – a blog about Stonehenge replicas. My kind of people.