The photo above is perfectly level, I can assure you. Pressurized artesian ground water provides hydrology for this place, and the main meadow is somewhat dome-shaped, thus the sloping meadow.
PHOTO TIP: Many cameras have a built-in level, and this tool is useful in framing landscape compositions shot from a tripod. That's how I know the above image is level. I use mine all the time. With Canon cameras, just tap your "info" button until the level appears on the camera's back screen (usually two taps). A horizontal line will appear across the screen. When it's red, the image is not level. Just adjust the camera until the line turns green, and you're level.
A photographer friend and I visited this fen in northern Ross County, Ohio, last Sunday. On this day, rain strongly threatened, and cut the trip short. It's a bit of a bushwhack to get back in there, and I didn't want to get caught in a deluge with my equipment. Nevertheless, there was still time for an hour or two of fen exploration, and even on this late date, there was much to see.
This fen, although only encompassing an acre or two of open meadow, is loaded with gentians. Hundreds of plants to be sure. The thing about fringed gentians is that the flowers are photosensitive, so if you visit them on a heavily overcast day as we did, the flowers will not be fully expanded. When they are, the petals expand and splay their tattered, fringed lobes outward. A quite stunning effect, but even when the flowers remain tightly enrolled on a cloudy day, they still look good. See above.
PHOTO TIP II: Flowers can be tough to photograph well, for a number of reasons. A common difficulty is that they're often amongst lots of botanical clutter - grasses, sedges, other plants. That's certainly the case with these gentians. I carry about a dozen pieces of thick card stock (about 8.5 x 11) in my backpack, and each is a different color. By holding one behind my subject, I can dramatically alter the background (bokeh) and temporarily hide the clutter from view. In this case, a slightly off-white color created, to me, a very pleasing backdrop, giving the image the look of a watercolor painting.