Conservatory - the name makes it sound so stodgy. This is a series of glass greenhouses, all connected. Lots of plants to see; each room has a different theme.
There is a unique instrument above your head in one of the rooms. See if you can find it.
Outside, don't miss the Dahlia Garden. I have never seen so many different kinds. From a distance they look like roses, but I assure you, they are dahlias.
A stature of Seward is outside - you know, the guy who bought Alaska from Russia for the U.S. Best deal in history.