10 of the world's most adventurous cruises

By Roderick Eime, for CNNUpdated 21st November 2013
Beautiful but still adventurous.
Beautiful but still adventurous.
Roderick Eime
Former war-torn areas now open for tourism.
Former war-torn areas now open for tourism.
Roderick Eime
Before the moon, there was the North Pole.
Before the moon, there was the North Pole.
courtesy Quark Expeditions