Image via Lilaesthete; deviantART; anonw
The Sunsphere by Community Tectonics — Knoxville, Tennessee
Images via Livability; KNOX
Tower of the Sun by Taro Okamoto for Expo ’70 — Osaka, Japan
Images via tribe; Brodie Karel
Floating Fountains by Isamu Noguchi for Expo ’70 — Osaka, Japan
Pavilhão Atlântico by Regino Cruz for Expo ’98 — Lisbon, Portugal
Images via gnrworld
Habitat76 by Moshdie Safdie for Expo 67 — Montreal, Canada
Image via annaday; orangemania
New York State Pavilion by Philip Johnson for Expo ’64 — Flushing Meadows-Corona Park, Queens, New York
Images via Randolph Mase
The Biosphère by Buckminster Fuller for Expo ’67 — Montreal, Canada
Images via The Wired Jester; The Main
The Alamillo Bridge by Santiago Calatrava for Expo ’92 — Seville, Spain
Image via designprocess; archidialog
The China Pavilion by He Jingtang for Expo 2010 — Shanghai, China
Image via SkyscraperPage; Ed Tse