So I'm building a travel site which is a labor of love at this point and I don't want to screw myself while optimizing the site for SEO. I've got tons of pages that are about specific locations and I guess I'm calling these my long tail keyword pages. My basic keyword I'm promoting on the index page is something like "travel guide". I realize that's such a broad keyword category to get a descent ranking. I was going to create a new page for every keyword variation on "travel guide", spin the content and give fresh pictures and links for each variation. All these pages will now link INTO my site. They will be orphan pages because nothing will point back to them. The only way to find them will be on the site map or a direct google search. Are these indeed "Landing Pages" that I've created? Once Google indexes my site, will it figure out what's going on and give me a penalty or is this perfectly legit? They'll all be similar, but not exact duplicates. Should I be concerned that nothing links back to them within the site other than the site map itself?