It looks like a straight central line going over a circle line, a small part of the map of the Underground.
There are four: London, Liverpool, Newcastle & Glasgow.
In undergrounds, you have to get underground kit then, kind it in the undergrounds in wall.
If you search Google images for "London 2012 logo" it will come up with photos.
they study plants in undergrounds
No, Richard Clarke did not create the 2012 London logo. The logo was created by Wolff Olins, a brand consultancy group based in London, New York City, and Dubai.
in one of the undergrounds of early poptropica
Transport for London.
Rimmel London?
On some forests and especially on undergrounds.
Roads, Railways, canals, airports, undergrounds
the 2012 olympic logo represents the Olympics in 2012 in London at wembly stadium.
Regester it in the Key Items pocket of your bag and exit your bag. Than press Y and alow it to save. Then you are in the undergrounds. Hint for the undergrounds - On the top screen in a map of the undergrounds and where the gold sparks are is where hidden treasure is. Use the Stylest (pen, stick) to tap and look for stuff.