This colossal hemispherical space colony boasts a gigantic, translucent dome with an intricate, metallic wireframe ceiling structure. Inside, vast mountain ranges rise with rugged peaks and verdant slopes, sharply contrasting with sprawling, futuristic cities composed of gleaming towers and intricate infrastructure. The dome's exterior appears smooth and reflective, while the internal wireframe adds a complex, structural texture. The entire structure feels massive and engineered, blending organic landscapes with advanced technology.