This would be a very cool and probably cold marathon. Can you believe it all booked up until 2010 and it is 40% filled.
Here is a bit of a description from the website
You will come face to face with icebergs, penguins, seals and whales while exploring the most pristine corner of the planet. Historians and scientists will provide lectures on board ship and wildlife excursions during landings in remote areas among seal colonies and penguin rookeries and at research bases.
