Here are descriptions in Thousand Suns terms for Larry Niven’s Ringworld, as described in the book of the same name, and Masaq’ Orbital from Iain M. Banks’ Culture novel Look to Windward.
Ringworld
Diameter: ~16.6 light minutes
Surface Area: Three million Terras
Gravity: 0.992
Atmosphere: Standard
Climate: Varies
Hydrographics: 50%
Population: Billions
Government: Multiple State/Anarchy
Law Level: Open
Tech Level: Stone Age (higher tech relics remain)
Hook: Weird Cultural Practices, Ruins
Masaq’ Orbital
Diameter: 3,000,000
Surface Area: Twenty Terras
Gravity: 0.89
Atmosphere: Standard
Climate: Varies
Hydrographics: 50%
Population: Tens of Billions
Government: Democracy
Law Level: Open
Tech Level: Pre-Galactic
Hooks: Entertainment, Xenophilic