I know that not many cachers like multis. I hope you will like this one though!
At the posted coordinates you will find a number made of metal (don't look at plastic numbers). From that number, subtract 35480. Now, project that many feet due north to find the final. I suggest you take a walk to the final rather than drive!
One of the best things that Houston can offer is its growing network of hiking and biking trails. One of my most favorite ones is the White Oak Bayou Greenway trail. Come enjoy the nature and find a few caches!