For Transylvania, this is a must see city.
This royal couple was crowned King and Queen of Greater Romania in Alba Iulia. The Hungarians also had history there as well, and like Hungary and its history there is more to learn.
Alba Iulia was a Roman fort, and has been there for countless centuries. It is also the burial sites for many of the Hungarian royals of Transylvania. This is an important note since many people see Transylvania as being a huge area with more natural resources than tourism attractions.