Wisconsin’s Bayfield Peninsula and the nearby Apostle Islands were once part of the same land mass, but over time they were carved away by retreating glaciers.  Much of the land underneath the islands and on the peninsula consists of sandstone.  On the northeast shore, the coastal landfall has been eroded as well, resulting in the creation of sea caves. The Apostle Islands National Lakeshore is a national park consisting of 21 islands, a sandspit and 12 miles of coastline, and is a 720-square-mile area in the midst of Lake Superior. For kayakers, it is as near to heaven as one…