Apostle Islands Ice Caves at the coast of Lake Superior, Bayfield, Wisconsin, USA

size: 445277
sha1: 45019e699d4ce729ada9928f44cc3e5249e5b6f1
sha256: b77ed8e3c721327ead6cdbf02bfaa442e1d61bbeb1eb33ff5c4afc1f786111ab

size: 454717
sha1: a670062e0ba9b47b7472f4a699c6b5daf4811292
sha256: df1d30854b4a5f3704a14f5a48dd9cbdcb8d9a33f75faca21c14d902837ee697