Most romantic spots?
Garden of Dawn
This place has a path leading to a natural spring. It looks kinda like a church
http://i.imgur.com/B0zc9bT.jpg
map
http://dulfy.net/wp-content/uploads/2013/03/gw2-dawngleam-pergola-guild-trek-3.jpg
Privet Garden
This place is a bit tricky to get to. Need teleport rifle. You can search on google or hit me in game, i’ll show you.
http://i.imgur.com/M4TaS7r.jpg
http://i.imgur.com/G3EV9W4.jpg
map
http://i.imgur.com/dAJudJW.jpg
Incoming Quaggans [iQ]
Privet Garden is amazingly beautiful.
You don’t need a teleportation gun to get there though.
-Look, look with your special eyes!
-My Dragonbrand!
To add on the ones described by NTDK:
http://wiki.guildwars2.com/wiki/Dierdre%27s_Steps
Arise, opressed of Tyria!
I was about to post garden of dawn. There are lots of very pretty places in tyria (some already mentioned here), but IMHO nothing beats it for a wedding. The general athmosphere is great, it’s easy to get to for your guests once you know how to, but still secluded and off the beaten path so it won’t be filled with random people, and the layour looks perfect for it as well, with a path leading to an “altar” of sorts.
wrapped up in some crazy ritualist hoo-ha from Cantha.
A real grab bag of ‘you can’t hurt me. They’re called Guardians.
I like Hidden Garden in Mount Maelstrom
I will put a +1 on the secret hidden spring in the grove. Beautiful private setting for a wedding.
If you want something more public though, to have other players listen/read/watch in…that might not be the best spot XD