I'm not talking about Hold capitals, but the Holds themselves...each region in Skyrim has its own, unique atmosphere and vegetation.
The barren and jagged craglands of the Reach teeming with Forsworn tribals, the Rohanesque plains of Whiterun, the temperate forests of Falkreath, the volcanic terrain of Eastmarch, the windswept and utterly silent, eerie icewastes of Winterhold...which part of Skyrim's countryside do you find most enthralling and magical?
Me? Right now Winterhold. Yes, it is barren and looks crappy in comparison with the lush greenery and beauty of other holds. But there is something really magical about Winterhold...you feel so lonely and isolated...and cold. You can see the winds blowing ice off the white dunes and frozen cliffs around you...and in front of you a dark ocean stretches, somewhere beyond which lies the frozen continent of Atmora. Standing at the northern edge of Tamriel has a wild beauty of its own.