It is caracterized by
External link
more on this biome (http://www.panda.org/about_wwf/where_we_work/ecoregions/global200/pages/habitat/habitat09.htm)
... Vault (recorded in Pittsburgh on July 8, 1990 at Three Rivers Stadium[?]) and Another View from the Vault (recorded in Washington, DC on June 14, 1991 at RFK Stadium[?].) ...