If you go to Costa Del Sol there is a spot that is great for looking at the ocean that most miss. Head north along the beaten path, not the beach. You'll be able to go up the standing rocks from here that will give you a great view of the ocean. From here at night you can see all the glowing reefs.

In Outer la Noscea my personal favorite spot for scenary is the floating city of nym. near the back of it is an amazing setting.

In Sea of Clouds there is a heart shape island on the west, and in the south east there is an island of water that you two can skim across.

In Churning mist you have Zenith and all its glory, in addition to a plethora of personal floating islands.

The Burning wall in East Thanala is beautiful and fun to navigate.

You could act out a play or coordinate some dances at Mhin Khitto Amphitheatre.

If this were more RPing based I'd also suggest duo a level 50 dungeon and taking your time. Some of them have amazing setting that get skipped because of the rushing. Satasha at sunset is one example.