英语翻译I looked down to the Colorado River about I kilometres b

英语翻译
I looked down to the Colorado River about I kilometres below me.If you put the there tallest buildings in the world at the bottom of the canyon they still won't reach the stop The I looked across to the other side of the canyon .How far is it?It's 20 kilometres maybe finally I Looked to my left and to my right and on both sides the canyon disappeared into the distance over 400 kilometres long.The Grand canyon is not just big It's huge!