Door County, Wisconsin. https://drgregbrick.com/ ... <看更多>

What makes that perfect domed shape and how is that hole in the ceiling created? Benagil sea cave, photo by Bruno Carlos. cavern · Share. ... <看更多>

Sea Cave on the Akun Island, Alaska, USA | #Geology #Awesome #View #USA This ... Akun Island is also mostly composed of basalt and has several sea caves ... ... <看更多>

Apr 29, 2016 - Fingal's Cave is a sea cave, formed entirely from hexagonally jointed basalt columns within a Paleocene lava flow, It is similar in structure ... ... <看更多>