I maintain several photo sites:

1.) this one.
If you have a photo directory, I may be interested in a direct link exchange between photo-sites.de and  your site.
Please contact me - as pointed out on the main page, I will not link to each and every photo site.

The text: Photo Sites.de - links to photo resources and outstanding photo galleries.

2.) Travel Photo Net.
To link to this site, you can use the following text:

<a href="http://www.travelphoto.net/">Travel Photo Net - Travel Photography  Online </a><br>
  Pictures from Asia, Africa, Australia, Europe and South America.<br>
  

This should look like the following link:

Travel Photo Net - Travel Photography Online
Pictures from Asia, Africa, Australia, Europe and South America.

Again, I will not guarantee a link back, so if you want to exchange links, please  contact me.

3.) Online Photo Galleries

<a href="http://www.onlinephotogalleries.com/">Online Photo Galleries -
  Nature and Travel Photography</a> <br>
  Thematic photo galleries concentrating on landscape, nature, wildlife and travel
  photography.

this should look as follows:
Online Photo Galleries -   Nature and Travel Photography
Thematic photo galleries concentrating on landscape, nature, wildlife and travel   photography

If you prefer a graphic link: O.P.G. Banners
As usual, I will not guarantee a link back, so if you want to exchange links, please contact me.