Is there a word for a small park?

For example, River is to stream as Lake is to pond. But what can one call a small park? My sister and I were talking about the tiny park in the ortigas district, and I felt uncomfortable calling it a park because really, you can walk across it in half a minute. Park sounds too big, but garden sounds too residential. I suggested smark. This didn’t go over well with the sister.

Any suggestions?