It is to the right of the lights that will zap you.
Wear the laser goggles.
in the greenhouse....u need a bow-tie to get there
The same way you got in. Up the pipe thingy.
if you are on the roof, go to the tower on the left by using your bowtie. then grapple to the antenne on the other roof and tada! you are at the greenhouse entrance
In the greenhouse of course! getting there is another question.
If you are talking about skullduggery you use it to hit the gong to scare the fish. If you are talking about steamworks you use it to get out of the greenhouse
First rescue the lady in the greenhouse by rolling the cherry bomb to her cage. Then she will give you laser goggles.
you climb on the near-by building and grab the antennae on the greenhouse building with your bow tie.
you go through the tube thing and then go to the ground and the rest you will find out along the way
on the rooftop. you get to it by grappling the antenne from the BAD thng by using the chemelion suit and then once you are on the first roof other than the BAD one, you grapple another roof and the spy is in the greenhouse in a cage. you blow the cage up with a cherry bom.
once you have the bowtie, you go to the rooftops and cling to a skyscraper thingy. when you see enter, you go into the green house.