As an introduction, this album
for those who haven't seen it.
After watching Eric's latest magnificent pictures of Pravčická Brana, often said to be Europe's largest with 16m both in height and width, and Vid's newest pictures of Pont d'Arc on the Ardèche river, I wondered if it was really the largest, seeing so many other impressive arches in all limestone mountain zones of southern Europe.
Popped on this site describing "L'arche naturelle de Chartreuse", said here to be Europe's largest too (without dimensions mentioned however), and Alp's largest on other pages :http://siou.free.fr/General/Pages/mount ... ando2.html
Remembering other large arches I've seen, I just wondered if both Etretat sea arches in the french Normandy were not larger as well, especially the Manneporte, whose dimentions I failed to find on internet, wikipedia and so on. But the Manneporte cape is said to be 60mh; if we watch carefully the picture, the arch is almost mid-height, so let's say 25m at least, and the width kind of same scale, which makes it easily concurring with Pravčická Brana.http://media.lonelyplanet.com/lpimg/286 ... review.jpg
As for Pont d'Arc on the Ardèche, it seems that no doubt are remaining, 60 m wide and 40 m high :http://en.wikipedia.org/wiki/Pont_d%27Arc
Any other ideas ? Lots of googling !