Granted I do not read many 'romance' books. However, these books while fantasy fiction do have a lot of the romance edge to them, and I didn't want to put them under classification of fantasy/fiction only. However, these are good books. Imagine 'A Wrinkle in Time' crossed with good old fashioned fantasy/romance.
Link(s)
Outlander Series
Outlander
Dragonfly in Amber
Voyager
Drums of Autumn
The Fiery Cross
A Breath of Snow and Ashes (new release in the series, which I've not yet read)