Slot Canyons: Natures Narrowest Masterpieces

Antelope Canyon USA is the most photographed. Buckskin Gulch is the longest slot canyon in the USA at 21 km. The Narrows in Zion requires hiking through a river.

Slot canyons form in sandstone by flash floods. They can be less than 1 m wide with walls over 100 m tall. Flash floods are the primary danger - water can rise meters in minutes..