I am amazed at how many business memos, advertisments, etc., are either written by ignorant people or in the case of typos, not proof read. This one could be either.
"While the ship is docked Cristobal Pier guests who did not purchase a shore excursions may debark the ship and WONDER(?) on their own."
Have always tried to figure out how one "wonders" with someone else. Guess it could occur but you and your companion had best agree on what is "wondrous" to the both of you.