Mack Arch Rock, Oregon, USA

© Dennis Frates/Alam

Info. Mack Arch Rock

Huge rock formations that stick out from the Pacific are a common sight along the coast of Oregon in western United States. The sea stacks you see here run next to a grassy promontory in the southern part of the state that looks over a mostly inaccessible stretch of coastline.

In the background of this image is the Mack Arch, one of the largest naturally formed arches on the Pacific coast. These groups of sea stacks and beaches are home to seabirds like cormorants, black oystercatchers, gulls and guillemots, as well as harbour seals and other marine wildlife. This pristine sanctuary is part of the Oregon Islands National Wildlife Refuge. The area is closed off to the public, so if you're looking to get a close-up view of Mack Arch, your best chance is to do so by plane or boat.