What's a good subject or topic for a coffee table book?

Question:

What's a good subject or topic for a coffee table book?

My friend and I are planning to come up with a coffee table book (maybe a hundred pages at most). She's a photographer and I am a writer. However, we're quite torn with regards to choosing the subject or topic we should focus on (something along the lines of nature or culture perhaps). What subject or topic would be interesting for you? Any recommendations?

Best Answer - Chosen by Asker: A coffee table book about coffee tables!!

Seinfeld reference. :)

Shelter animals would be great. Especially if some of the profits went to help out the shelters.