Inazuma is host to a traversal mechanic not available in Mondstadt or Liyue, which makes a lot of sense given the nature of the nation of Inazuma which is a collection of islands separated by vast stretches of water, that being Waveriders (i.e. boats) which you can summon via a Waverider Waypoint which looks like this
and appears on your map as
Which allows you to navigate the seas between the Inazuman isles without needing to glide or swim between them (just don't try sailing a Waverider back to Mondstadt or Liyue lest ye be smote by the lightning of the almighty Shogun)