Only one of these can exist in the world. If several players would build it on the same turn, whoever has the most excess production will get the wonder.
Angkor Wat: Culture and Gold cost of acquiring new tiles reduced by 25% in all cities
Big Ben: Cost of Gold purchasing in all cities reduced by 15%
Brandenburg Gate: A Great General appears near the Capital and +15 experience for all new units built in this city
Chichen Itza: Length of Golden Ages increased by 50%
Colossus: +1 Gold from water tiles worked by this City
Cristo Redentor: Culture cost of adopting new Policies reduced by 10%
Eiffel Tower: +5 Happiness and +1 Happiness for every two polices
Forbidden Palace: Unhappiness from number of citizens in non-occupied cities reduced by 10%
Great Library: 1 Free Technology and provides a free Library in the city which it is built
Great Lighthouse: All military naval units receive +1 Movement and +1 Sight
Great Wall: Enemy land units must spend 1 extra movement point when inside your territory
Hagia Sophia: Generates a Great Prophet and provides a free temple in the city which it was built
Hanging Gardens: +10 Food in the city where the wonder is built
Himeji Castle: +15% combat strength for units fighting in friendly territory
Hubble Telescope: Provides a free spaceship factory in the city it was built and generates two Great Scientists
Kremlin: Defensive Buildings in all Cities are 25% more effective
Louvre: 2 free Great Artists appear near the Capital
United Nations: Triggers voting for the Diplomatic Victory
Mausoleum of Halicarnassus (DLC): +2 Gold for each source of Marble or Stone worked by this City and 100 Gold for each great person expended
Statue of Zeus (DLC): All units gain +15% combat strength when attacking cities
Temple of Artemis (DLC): +10% Growth in all cities and +15% Production of range units
Alhambra (G&K): Provides all units constructed in the city the Drill I promotion (Combat bonus in rough terrain). Adds a free castle as well as a +20% boost to Culture in the city in which it was built
CN Tower (G&K): Free Broadcast Tower in every city and +1 Population and Happiness per city
Great Firewall (G&K): Prevents technology theft in the city it is built and drastically reduces technology theft in all other cities in the Empire
Great Mosque of Djenne (G&K): All missionaries born in this city may spread a religion 3 times instead of 2. Provides a free mosque in the city in which it was built
Leaning Tower of Pisa (G&K) +25% boost to Great People generation in all cities and generates a Great Person of your choice
Petra (G&K): +1 Gold, Production, and Food for each desert tile worked by this city. +6 Culture when Archaeology is discovered. Provides a free amphitheater in the city in which it was built
Apollo Program: Begins the race to construct the parts listed below.
SS Booster: One of the parts required to trigger a Science Victory.
SS Cockpit: One of the parts required to trigger a Science Victory.
SS Engine: One of the parts required to trigger a Science Victory.
SS Stasis Chamber: One of the parts required to trigger a Science Victory.
Manhattan Project: Grants the civilization constructing it the ability to construct nuculear warheads.
Utopia Project: Grants the civilization constructing it a Cultural Victory.
Note: The Three Gorges Dam was planned to be a wonder, but was left out. Its quote was going to be, "The people turn to a benevolent ruler as water flows downwards and as wild beasts fly to the wilderness - Mencius"