Have you ever thought about visiting Area 51? If the your answer is positive, you might want to check this book

Its author claims to know about several secret places (area 51 included) ! Wouldn’t it be cool to go to one of these places and, at least, take some pictures ?

This is the description by Harry Helms :

Your Travel Guide to Germ Warfare Laboratories, Clandestine Aircraft Bases, and Other Places in the United States You’re Not Supposed to Know About

We could buy it here : http://feralhouse.com/titles/investigations/top_secret_tourism.php