The ideological currents and religious beliefs are no longer the same as they were before, now couples want to unite in a different way. They want to show their love and tell to their loved ones their story.
Symbolic weddings are completely personalized and you can have your wedding like your favorite movie. In addition, it is perfect for an LGBT wedding since the purpose of this type of wedding is to show love at it is.
The most famous is the sand ritual, where each of you will put the sand of different color into a jar giving the symbolism of union. I recommend that you keep that bottle in your new home to remind the commitment you made with your partner.