It's a small botanical garden and seemed a bit unkempt with a few dead specimens and some weed…read moresprouting up. The conservatory felt messy and crowded, with plants not people, but I did enjoy the carnivorous plant collection. There was a small rotating exhibit in another building that was interesting. The current one was of plant in fashion, think plant based dyes etc. Compared to the nearby Retiro Park, or even the Parque del Oeste across town, this garden really was unimpressive. And it's the only one of the three that charges an entrance fee! Sure, 4 euros isn't a lot, but if you are short on time, I'd definitely skip this.