Not so much use to a travel agent I dont think, more value maybe if you develop it and try and get some sign ups from it for casinos.
If someone from Holland types in Holland Casino then you might do well for sign ups.
You wouldnt need to do much really with it, would take you a day to put a basic page up, put some ads up, do a bit of copying and pasting from places and see what happens.
Have a black main page with a windmill, a H1 font saying holland casino
bit of links to pages and then a few tips and tricks, a few ads and bang all sorted.
Adding a bit more thought to this, Holland Casinos would probaly be better to a travel agent if thats what you think you can get as obviously plurals means more than one.