Gretchen P.
Yelp
This park is a bit like Camelot. Nothing so grand and it doesn't reappear every five hundred years, rather it's all in the journey to this mildly hidden, hard to get to location. If you drive past it and look at the "pretty from the street/shady from your parking spot" parking lot with accompanying sculpture and landscape, you're going to miss a lush and relaxing cross-section of not-really landscaped Houston with accompanying stretch of Buffalo Bayou.
Park your car (preferably in a space with no broken car window glass), lock your valuables in the trunk, and take a peek around. Once you step to the edge, looking into the flood plain, a Camelot-esque Houston park awaits you. Hidden from the passing traffic above ground.
Below, there is a sand volleyball court, a playground, lots of green space, picnic tables, a boat launch(?), and a sidewalk for the ambulatory-challenged. The jogging trail with helpful landmark signs winds through here, as well. So, if you're feeling a bit adventurous, you can wander into downtown via bayou walkway, or head in the opposite direction towards St. Thomas.
Truly it's not that difficult to find, however it really helps to approach it from Bagby, heading west on Allen Pkwy. If, however, you are attending a fireworks display or Summerfest, you may have to head farther into downtown to park your car, then walk your lunch off in the journey to the park.
If you go on a "normal day," park in the lot. Stow any valuables in your trunk and take your phone. I wouldn't say it was dangerous, but I did get a weird, creepy vibe while walking around on one adventure. When I saw the used condom on the ground, I immediately thought, "Well, at least the disgusting litterbugs were safe about the sex."