Being president of the United States can no doubt be one of the most stressful jobs on the planet. But former President Barack Obama did find a simple way to clear his mind at the start and end of each day.

"For eight years in the White House, I walked along the West Colonnade to get to and from the Oval Office—a one-minute, open-air commute," Obama said on Instagram on Tuesday, referring to the outdoor, covered pavilion between the White House residence and the West Wing (pictured above).