posted 06-15-99 10:13 PM ET            

But, not have the double cost...have it graded. If they want the building to be greater, all they'd have to do is add 10% to the cost...but, to have it last even longer, they could add subsequent 10% increases, so as to beat it would be more expensive, etc.
i.e., Tokyo=100. Seoul=110+. If Seoul paid 110, next city (Atlanta-US) would pay 121+. If Seoul paid 150, Atlanta would pay 165+.
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As for world wonders. etc:
I like the idea of two catergories:
Wonders (Only built by one nation, can't be rebuilt) and Secret Projects (can be rebuilt, built by multiple nations)
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Also, a lot of the wonders listed above could be considered local wonders, these could have small effects:
Abu Simbel
Alfred Nobel's Foundation
The Almagest (Ptolemy's Almagest)
The Great Canal
The Iliad
Imperial Navy Shipyard
The Kaaba
King Asoka's Edict
The Kremlin
The Leaning Tower
Machu Pichu
The Mausoleum
Mines of Potosi
The Moai Statues
Potala
Red Square
The Shwedagon Pagoda
Stupa of Wild Goose
Sultan's Forge: boost to gunpowder units/cannons
Tennessee Valley Authority
Ziggurat at Ur
Taj Mahal
The Throne Hall of Persepolis
Banaue Rice Terraces
Great General Staff (Gro�er Generalstab)
Admiral Nelson's Fleet
Alaskan Oil Pipeline
Diderot's Encyclopedia
Area 51
Aristotle's Encyclopedia of Knowledge
Sydney Opera House
Francis Bacon's Royal Society
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Here is my suggested list:
() denotes catergory, so it would be Greatest Temple, Greatest Cathedral, etc., and each one counts as a separate greatest.
[] denotes the effect of the thing.
{} denotes names automatically given, or names that can be given to it.
/\ denotes limitations

World's Greatest, small effects only applying to host city
Tallest Building [+trade]
Longest Bridge [+trade] /must be built between cities across channel, river\
Longest Tunnel [+trade] /must be built between cities across channel (~Chunnel), river, mountain, hill\
Greatest (Places of Worship (temple, cathedral)) [+happiness +trade]
Greatest (Places of Trade (marketplace, bank, stock exchange, supermarket)) [+trade]
Best (Places of Education (university, library, academy)) [+science]
Best Superhighways [+production *easier travel between cities]
Largest Harbor [+production +food +trade] /must be built in cities with access to inland seas or oceans\
Busiest Airport [+food +production +trade *easier travel between cities such as multiple flights from airports to this city]
Busiest Seaport [+food +production +trade] /must be built in cities with access to ocean\
Best Hospital [+science +happiness]
Best (Factories) [+production +trade +science]
Best Arcologies [+trade +science +food +production] /must be built in cities with all city radii squares filled, or cities larger than 21 people\
Best (Entertainment Complexes (Stadium, Holotheaters, Movie Palaces)) [+trade +happiness]
Largest Corporation [+trade +science +production +energy]
Greatest Clock Tower [+trade +production]
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Landmarks, randomly seeded by the fractal map generator; confers bonuses to all tiles within a city radius
Big Waterfalls {goes by Niagara, Angel, etc.} [+energy +trade +production]
Big Mountains {Kilimanjaro, McKinley, K2, etc.} [+energy +trade -population]
Big Canyons, Trenches {Grand Canyon, Great Rift Valley, Marianas Trench, etc.} [+energy +trade]
Big Volcanos {Krakatoa, Pinatubo, etc.} [+energy +production -population]
Big Reefs {Great Barrier Reef, etc.} [+trade +science +food]
Big Forests {Schwarzwald, etc.} [+trade +science +production]
Big Jungles {Amazon Rain Forest, the Congo Rain Forest, etc.} [+trade +science +food +production]
Big Deserts {Sahara, etc.} [+trade +science -population]
Big Inland Freshwater Seas {Great Lakes, Lake Victoria, etc.} [+trade +science +food]
Big Inland Saltwater Seas {Caspian Sea, Great Salt Lake, etc.} [+trade +science]
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Wonders, cannot be rebuilt; delayed construction period if first to build it, no delay period if someone is already building it; can be renamed; helps determine culture, determined also by culture; dependent upon geography location; free maintainance; all can be named differently
�[Increases Happiness regardless of distance to capital]
{J.S. Bach's} Cathedral
Hanging Gardens /must be built within 2 squares of water\
{Confucious} Academy

�[Acts as a Granary in each city]
Stonehenge
Pyramids

�[Doubles effectiveness of Temples, Cathedrals; Doubles tithes]
{Michelangelo's, Hagia Sophia} Cathedral
Oracle

�[Eliminates Crime/Corruption/Waste/Inefficiency]
Chichen Itza

�[Reduces military readiness costs]
Sphinx

�[Increases trade]
The Labyrinth
Global EBank

�[Increases trade, Opens embassies in other nations]
{Marco Polo's} Expedition

�[Opens embassies in other nations, Prevents others from attacking first]
The United Nations /Must be a cooperative effort from at least three nations\

�[Increases trade over water, Increases ship movement]
{Magellan's} Expedition /Must be built in a city with access to an ocean\
{East India Company} /Must be built in a city with access to an ocean\

�[Increases science, eliminates conversion]
{Gutenburg Bible}

�[Increases Science Output]
{Copernicus', Galileo's, Tycho's} Observatory
{Isaac Newton's} College

�[Frees slaves, causes freed slaves in enemy civs to be unhappy]
Emancipation Act /Can only be built in a republic, democracy\

�[Eliminates maintinence]
{Adam Smith's Trading Company}

�[Two discoveries immediate; thereafter, 10 free advances per age on average]
{Darwin's} Voyage /Must be built in a city with access to an ocean\

�[Increases Gold in host city]
Colossus

�[Increases defense in every city, Prevents others from attacking first]
Great Wall

�[Eliminates all Nuclear weaponry]
Nanite Defuser

�[Ends threat of global disaster]
Gaia Controller

�[Allows construction of EcoRangers, destroys top three pollution cities]
Eden Project

�[Government/Social Engineering Choice switchovers immediate]
{Statue of Liberty, Motherland Calls, Gateway Arch}

�[Acts as a power plant in each city on the same continent, increases production]
{Hoover, Aswan High, Three Gorges, Itaip�} Dam /Must be built on a river tile, causes an inland sea to form behind it\
Singularity Inductor

�[Any advance known to at least 2 other nations]
Great Library

�[Increases Happiness in Random city of a member nation every 4 years]
The Olympic Games

�[Victory Wonder]
Wormhole Sensor/Voice of Planet-Ascent to Transcendance/Extrasolar colony

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National Projects, can be rebuilt; delayed construction period if first to build it, no delay period if someone is already building it; can be renamed; helps determine culture, determined also by culture; dependent upon geography location; high maintainance; all can be named differently, weaker effects
�[Increases Happiness regardless of distance to capital]
Cure for Cancer
{Ramayana}
Clinical Immortality
Contraception

�[Increases host city's happiness]
{Shakespeare's} Theater
Coliseum (NOT THE Stadium)

�[Acts as a barracks/command center in each city]
The Command Nexus
{Sun Tzu's} War Academy

�[Increases Voting Power in Earth Council, closes foreign embassies already open (does not prevent new ones from opening), opens embassies in other nations]
Empath Guild

�[Increases trade, Closes foreign embassies]
Forbidden City

�[Increases trade, Opens embassies in other nations]
Philosopher's Stone

�[Increases trade, Earns higher regard]
{Eiffel, Tokyo} Tower

�[Increases ship movement, Naval base in each city]
The Maritime Control Center

�[Increases Science Output]
SETI
Supercollider
{Edison's} Lab

�[Universal increase in Science Output for all civs with Internet advance; Increases trade]
Internet Backbone

�[Increases Science Output, 10 free advances on average per age]
Universal Translator

�[Halves Maintenance]
Self-Aware Colony

�[Halves Maintenance, Increases trade]
{London} Exchange

�[Increases happiness, production, and health; protects city from disease]
Immunity Chip
Human Genome Project
Longevity Vaccine

�[Increases trade from each civ with Television advance; Competition arises if more than one exists, which means those that have a higher luxury rate will have a higher percentage of gold returning from this project from a gold pool created from ((.5�total city trade₁)+(.5�total city trade₂)+...), with each city in a civ that has the television advance]
{Hollywood}

�[Radar coverage of the world]
Globesat

�[Allows construction of Space improvements]
{Apollo} Program

�[Protection of a spy in each city]
Hunter-Seeker Algorithm
{The Agency, FBI, CIA, MI6, MI5, KGB, GRU}

�[Increases trade in host city]
{Merchant Exchange, Wall Street}
Dinosaur Park

�[Free transportation/orbital insertion, Space colony directly overhead, space improvement costs halved]
Space Elevator

�[Increases Defense in every city]
National Shield
Citizen's Defense Force

�[Eliminates overcrowding and pollution unhappiness; Research Facilities Increase happiness, trade]
Virtual World

�[Allows construction of Nuclear weaponry]
{Manhattan} Project

�[Allows construction of Planet Buster weaponry]
The Primer

�[Increases Production in Host city]
{King Richard's} Crusade

�[Increases production, no limits on instantaneous transport via Psi Gate or Airport]
Bulk Matter Transmitter

�[Complete repairs in the field, upgrades free/halved]
{Leonardo's, Nakamatsu's} Workshop
Nano Factory

�[Reduces war unhappiness]
Universal Suffrage

�[Reduces unhappiness/rioting]
AI Entity
Telepathic Matrix

�[Any advance known to at least 2 other nations with the Internet Advance]
Planetary Datalinks

�[Increases Psi attack/defense]
Neural Amplifier
Dream Twister

�[+2 SUPPORT]
Living Refinery

�[Increases terraforming rate]
Weather Paradigm

�[Can exceed population restrictions, +1 POLICE]
Ascetic Virtues

�[Bases start at size 3, happiness increased in cities smaller than 5]
Planetary Transit System

�[Permanent Population boom]
Cloning Vats