By Rob Koplitz | East China Sea south of Jeju island.

By Roberto Ortu | Cabras, Sardinia, Italy

By ROBERTO BURKLE | Playa del Carmen, Quintana Roo, México

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Ortu | Cabras, Sardinia, Italy

By Robert Strickler | Spartanburg, SC, USA

By Roberto Ortu | Cabras, Sardinia, Italy

By Robin Blanc | St. Ann, MO

By Roberto Ortu | Cabras, Sardinia, Italy

By Roberto Adam | Winston-Salem, NC

By Roberto Ortu | Cabras, Sardinia, Italy