Many of the US National Parks charge some sort of fee to get in, either a nominal day-use fee, or in the case of big, popular, and over-used parks like Yosemite, a hefty $20 per car entry fee.
Just as California's state parks are on the verge of closing (and our governor is talking about "selling state property" including San Quentin, which makes me wonder a bit about other state land), the National Park Service is instituting a series of fee-free days in our national parks.
I collect natural history, environmental, and geography books, almost compulsively. I look for used versions where I can (to save paper) but also appreciate that many of these books come out in runs of a few thousand copies, and aren't profit-makers for the publishing companies, so when they come out new, I buy them while they're new. If you like Geographile and want to let me know, please either comment on my posts, or visit my Powell's wishlist to feed my book collection. You might find books you like there, too.