The Lincoln Park Conservatory is located at 2391 N Stockton Dr. It’s in-between the Nature Museum and the Lincoln Park Zoo. It’s a great place to go in winter to get away from the cold.
They have koi and goldfish. They also have plenty of places to sit and just soak up the warmth and the greenery.
When I went the show room seemed to be decorated for valentines day with a heart made of flowers in one of the ponds and classical music playing. It’s free to visit and is definably fun to check out.