My brother and I visited Amiens in Sept. 2011 as a 2 day stopover as part of our WW1 Battlefields tour. We were fortunate enough to be shown around this magnificent Cathedrale. We were also lucky enough to be shown around the internal balcony and out on the roof. The floor takes on a different perspective about 20 metres up. I have no religious interest at all but found this cathedral fascinating, the architecture and the sheer size were most impressive. From the right angle you can see the bend in the timber spire, and the laser light show is worth a look too.