Improvements
Airstrip
Alcázar
Barricade
Batey
Camp
Château
Colossal Head
Corporation
Farm
Feitoria
Fishing Boats
Fort
Great Wall
Hacienda
Industry
Kampung
Kurgan
Lumber Mill
Mahavihara
Mine
Missile Silo
Mission
Modernized Trap
Monastery
Nubian Pyramid
Offshore Oil Rig
Oil Well
Outback Station
Pairidaeza
Pasture
Plantation
Quarry
Reinforced Barricade
Rock-Hewn Church
Roman Fort
Seaside Resort
Sphinx
Stepwell
Trading Dome
Trap
Ziggurat
Routes
Traits