Iceland is a superb place to visit in winter according to Lonely Planet author Tom Hall. Thermal pools and northern lights are among his personal favourites! Here is what he had to say about Iceland in winter:

"...regular visitors find it’s not as chilly as they were expecting, with temperatures hovering around freezing. The thermal pools that warm the cockles of locals are essential destinations, and best of all is the chance, once out of the city, of getting a gala performance of the Aurora Borealis (Northern Lights). You need to be lucky with cloud cover, but with good fortune your winter trip here will feature one of nature’s greatest free shows."
 
View the complete article here.