The Subway , Zion National Park , Utah , USA
"Without a doubt one of the most amazing experiences i've ever had. We were lucky enough to secure permits for the hike the Subway before leaving Australia so this was the number one thing to do on my list....and it lived up to all my expectations. A 9.5 mile strenuous hike which included some steep descents, rappelling and swimming through debris filled water holes....but this is the reward, morning light shining through the tunnel of the Subway. Just beautiful!"