Civilization II/Wonders

Apollo Program
Launch of a spaceship into planet orbit. Astronauts return with pictures of the globe. Effect being whole map revealed

The Colossus
The city that built The Colossus will produce one extra trade arrow in each square that already produces one. Effects expire with discovery of Flight

Copernicus' Observatory
Copernicus' Observatory will increase the science output of the city it is built in by 50%. Effects do not expire.

Cure for Cancer
The Cure for Cancer provides one extra happy citizen in each city. Effects do not expire

The Great Wall
Grants virtual City walls to every city of owners civ. Increasing defence.

Effect expires after discovery of Metallurgy

Magellan's Expedition
The construction of Magellan's Expedition allows all of one's own naval vessels to move 2 more spaces than listed in their description.