Here is the full list of all 10 Tropico 4: Modern Times achievements.
Have a Babel Tower with 50 employees
Have a Ziggurat with 50 families as tenants
Renovate your Palace
Build 4 Bio Farms and 4 Organic Ranches in a single mission
Build a Diamond Cathedral before 1990
Build an Aerodrome and a Seven-star hotel in a single mission