Canton de Chelly, Arizona: A wooden loo at the base of Spider Rock, an 800ft sandstone spire revered by Navajo Indians

The Valley of Longevity, Ecuador: A wooden long-drop that lives up to its description, high in the Andes

Cliff-Top Chateau, France: This 'oasis of pis' overlooks a picturesque bend in the Dordogne River

Changi Airport, Singapore: Plane spotters in the new terminal 3 can take a wee look at the giant Airbus A380

Tasman Glacier, New Zealand: An aerial shot shows just how close this loo is to the edge

Mount Sinai, Egypt: The best place to see sunrise on the mountain is said to be from this toilet, where the early-morning light floods through the bamboo walls

Boulder Pass Campsite, Montana: A wooden loo in Glacier National Park, with a stunning view of Agassiz Glacier