-- README
-- Author: aradgula
-- DateCreated: 12/19/2021 9:24:43 PM
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Credits:
FramedArchitecture - Lua, sql, xml)
Jason Grade - (xml, ideas)

Adds three new buildings to build out a National Park System. Cities must have a Natural Wonder within their borders.

1) National Park Service: May only be built once per civilization (requires Natural Wonder within borders, +4 Science, +1 Culture, City Culture increased by 2%)(Tech_Dynamite)

2) National Park Entrance: Requires the National Park Service and a Natural Wonder within its borders, available in all cities that meet these reqs. (+1 Gold, +1 Tourism, +1 Happiness, Specialist_Engineer slot, increases local Natural Wonder yields by +1 Science and +1 Culture if worked by city, yields stack the more cities you have with a National Park Entrance near a Natural Wonder, v.15 & higher Provides National park Service with +1 Gold, +1 Science) (Tech_Railroad)

3) National Park Visitor Center: Requires National Park Entrance, available in all cities that meet this req. (+2 Gold, +2 Tourism, +2 Culture, +1 Happiness, increases local Natural Wonder yield by +1 Gold, yields stack the more cities you have with a Visitor Center near a Natural Wonder, v.15 & higher Provides National park Service with +1 Gold, +1 Cutlure) (Tech_Electronics)