At some feet, Mt. McKinley's (Alaska) base to peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua
PHOTOS: Frozen bubbles make Alberta lake pop for photographer
Frozen bubbles in Canadian lakes - Methane gas bubbles underneath Vermillion Lakes in Banff National Park, Alberta, Canada. Normally the bubbles would break the surface but in low temperatures they freeze.