Thrill-seekers Eric Zoesch, 29, and Paul School, 34, cycle over frozen lakes and through icy caves more than 30 meters high in below freezing conditions in Alaska, USA. The cyclists spent over 10 hours in -12 degree Celsius (10 F) travelling over 24 miles of uneven slippery ice over three glaciers. [Photo: VCG]"

Thrill-seekers Eric Zoesch, 29, and Paul School, 34, cycle over frozen lakes and through icy caves more than 30 meters high in below freezing conditions in Alaska, USA. The cyclists spent over 10 hours in -12 degree Celsius (10 F) travelling over 24 miles of uneven slippery ice over three glaciers. [Photo: VCG]"

Thrill-seekers Eric Zoesch, 29, and Paul School, 34, cycle over frozen lakes and through icy caves more than 30 meters high in below freezing conditions in Alaska, USA. The cyclists spent over 10 hours in -12 degree Celsius (10 F) travelling over 24 miles of uneven slippery ice over three glaciers. [Photo: VCG]"

Thrill-seekers Eric Zoesch, 29, and Paul School, 34, cycle over frozen lakes and through icy caves more than 30 meters high in below freezing conditions in Alaska, USA. The cyclists spent over 10 hours in -12 degree Celsius (10 F) travelling over 24 miles of uneven slippery ice over three glaciers. [Photo: VCG]"