San Fransisco’s Bay Stadium, 2154

Starfleet Headquarters, San Fransisco, 2154

The signing of the Federation Charter, 2161

The capital city of ShiKhar, planet Vulcan

The buildings of ShiKahr

The capital city of Romulus

The capital city of Romulus, showing the Senate chamber

The Romulan Senate Chamber

The Millenium Gate, from Voyager episode, 11:59

Paolo Soleri’s Hyperbuilding

Le Corbusier’s proposed revision of Paris

(images mostly from Enterprise Screencaps; others via Google and my archives)