Thanks, Jim for spot-on advice...AGAIN!
What Jim has said is correct. Even if you have a photo album site, all the files there originated from your computer at some point in time. In other words, you had to upload them to Photobucket, Flickr, etc. from your computer.
If you know where those files are on your computer, just upload them here, at their full size. Images can be up to 25 MEGAbytes in size now! If you do it that way, then the "click to enlarge" feature will work for you...like this:
This is NKP 765 pulling a CSX freight train back in 1991.