I don't normally post apps like this but Trey Ratcliff's work is really something - Photo Voyages Of Trey Ratcliff for Android contains over hundreds and hundreds of High Resolution HD photos that were taken from all around the world by Trey Ratcliff!
You can quickly set any photo as a wallpaper via the app itself and there are two versions available - a FREE version which contains some photos as a sampler and the full app costs a very very cheap $0.99! It used to cost $3 but I guess Trey decided to bring the cost down so that everyone can buy and enjoy his work! If you have an Android Tablet, you MUST get the full version. I did and the photos are absolutely gorgeous.
Don't believe me? Check out the FREE version below then when you want more, upgrade to the premium version for a cheap $0.99 only!
Photo Voyages Of Trey Ratcliff FREE Version (FREE) - Android Market