Forget Mt. Everest — it's not even close to the most difficult mountains to climb, according to mountaineers

Hundreds of people stand atop Mt. Everest each year. But far fewer summit the Seven Second Summits, the second-highest peaks on each continent that push climbers to their limits.

Daniel Prudek/Business Insider

• When climbing huge mountains, height and difficulty don't always go hand in hand, mountaineers say.
• Mt. Everest may be the world's tallest peak, but it's easier to summit than other smaller mountains, like the Seven Second Summits.
• Three professional mountaineers...