Definitely a mainstay and a must see. As a graduate student I have the fortunate opportunity to visit Phipps during the school year for free, and I wish that I took advantage of this more- hell, I'm a plant biologist who works two blocks from the building! Nevertheless, I've been to Phipps twice and had a great time both visits. It's great to be able to take an afternoon to walk around the grounds; it's very peaceful, tranquil to go alone, or a fun place to take friends or family that visit the city. The tropical exhibit is an obvious highlight- and being a tropical plant biologist myself, I am impressed with everything they have there (however, they tend to throw the kitchen sink at you with every tropical plant imaginable arranged in my opinion in no particular taxonomic order). The glass pieces are beautiful, picturesque pieces that are perfect for the cover of a postcard or a website. Undoubtedly worth a visit, particularly in the spring or summer where everything outside is in bloom.