Yes, there is a Como Park Zoo. It's much nicer than it was 50 years ago, but it's been greatly overshadowed by the much larger Minnesota Zoo about 20 miles away in Apple Valley.

Getting back to Lake Como (in St. Paul): I should have mentioned that it has a pavilion that makes a nice venue for open-air concerts.

Here's a view from inside the pavilion,
a view from outside
a view from farther down the lake