The park is really an area between the convergence of Vivian and Astra avenues in the North Point neighborhood of St. Louis:
Here's how the streets got their names:
Vivian" is a usual English form of a Latin word meaning "living, alive." Originated In the North Pointe addition of 1921, it probably was named for a daughter of the Switzer family, former property owner. Vivian Avenue is in the 1921 North Pointe Addition north and west of Florissant Avenue.There is no park sign or anything else really, just a cut-through and a trash can and a sign that says "no fun here folks":
Derived from a Greek word meaning star-like, in the 1921 North Pointe addition. (source)
The homes that line the park are the gingerbreads and bungalows of the 1920's that St. Louis has in spades.