<https://forums.geocaching.com/GC/index.php?/topic/272463-can-you-bulk-add-to-bookmark-list/#comment-4683877>
<http://schema.org/text>
"Not exactly what you're asking for, but there's a way that's a bit quicker than opening each cache page-- \n  \nBring up the map of the area, click on each cache icon and an option to Bookmark It comes up. \n"
<https://forums.geocaching.com/GC/index.php?/topic/272463-can-you-bulk-add-to-bookmark-list/>