Terrarium City was a spectacular feat of architecture situated on the world of Alderaan.
This city was constructed within a naturally occurring dip in a flat landscape. This depression was enlarged, made airtight, and then filled with a liquid polymer. Converted warships orbiting the world then sculpted the solidified polymer into habitable areas. This procedure was replicated until the city's infrastructure comprised 18 distinct levels.
The polymer material had the unique property of being easily remodeled by the residents of the city. Consequently, the majority of walls within each apartment could be transformed into artistic expressions through manipulation. To finalize the construction, a transparent layer was placed as a roof, with slender towers functioning as turbolift conduits and waste disposal mechanisms.
As with the rest of Alderaan, it met its end in 0 BBY due to the Death Star's powerful superlaser. In the era of the New Republic, the Solo apartment located on Coruscant featured a holographic representation of Terrarium City.