Blast Furnace 
Mountain 
 2% additional units trained for free for every 1% (max 20% extra units).

Cavern 
Hill 
 +100 units sendable.
 XP generation increased by 2.5% for every 1% (max +250%).

Constabulary 
Hill 
 Spy strength on defense increased by 20% for every 1%.
 Houses 40 spies and units that count as spies.
 Houses 0 people.

Factory 
Hill 
 Construction costs decreased by 5% for every 1% (max 50% reduction).
 Rezoning costs decreased by 5% for every 1% (max 50% reduction).
 Construction time decreased by 2.5% for every 1% (max 25% reduction).

Gem Mine 
Mountain 
 Produces 15 gems per tick.

Gold Mine 
Plain 
 Produces 50 gold per tick.

Guard Tower 
Hill 
 Defensive power increased by 1.8% for every 1% (max +36% DP).

Incinerator 
Hill 
 Defensive casualties decreased by 5% for every 1% (max 50% reduction).
 Offensive casualties decreased by 5% for every 1% (max 50% reduction).
 Prestige gains increased by 2.5% for every 1% (max +25%)

Magma Chamber 
Mountain 
 Houses 30 people.
 4% population growth rate for every 1%.
 Provides 0 jobs.

Military Academy 
Hill 
 Offensive power increased by 1.8% for every 1% (max +36% OP)

School 
Plain 
 Improvements increased by 2.75% for every 1%.

Smithy 
Plain 
 Unit gold costs 2% for every 1% (max 40% reduction).
 Unit ore costs 2% for every 1% (max 40% reduction).

Tower 
Swamp 
 Produces 25 mana per tick.

Vault 
Mountain 
 Protects 25000 gold from theft.
 Protects 2500 gems from theft.
 Protects 10000 ore from theft.

Watch Tower 
Swamp 
 1.8% target defensive modifiers for every 1% (max 36% or 0% defensive modifiers).

Watermill 
Water 
 Ore production increased by 4% for every 1% (max +20%).
 Gem production increased by 4% for every 1% (max +20%).

Wellspring 
Water 
 Converts 40 magma into 20 obsidian per tick.

Wizard Guild 
Swamp 
 Wizard strength recovery increased by 0.1% for every 1% (max +2%).
 Wizard and arch mage training costs decreased by 2% for every 1% (max 40% reduction).
 Spell mana costs decreased by 2% for every 1% (max 40% reduction).
 Houses 40 wizards and units that count as wizards.
 Houses 0 people.
