There is few cases of wonders requiring wonders.
Pyramid and sphinx must be built in same city to get another wonder.
Two casino wonders needs to be built in same city to get another wonder.
SETI WW requires radio telescope NW, which requires 4 universities and other stuff.
Kepler Space Telescope is required by ET discovery.
This wonder needs space map to be built, as only space mission reward can build it.
This means you can't build ET discovery at all on regular maps.
Pyramid and sphinx must be built in same city to get another wonder.
Two casino wonders needs to be built in same city to get another wonder.
SETI WW requires radio telescope NW, which requires 4 universities and other stuff.
Kepler Space Telescope is required by ET discovery.
This wonder needs space map to be built, as only space mission reward can build it.
This means you can't build ET discovery at all on regular maps.
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