While it doesn't look easy on the feet, this pallet floor is certainly easier on the environment. You probably wouldn't want something like this in your home, but a shed or cabin? It might be just the rustic look you're looking for.
If you've ever tried working with pallets, you'll know that they are tough and made to take a beating. Deconstructing pallets into floor is one way to make a rustic and long-lasting floor while reusing something that otherwise gets trashed.
(Image by Readymade)