There are many different structures in the game, broken up into 3 categories, each having a different effect on world: Environmental, Facilities, and Crops (which are outlined in detail here).
Environmental[]
Image
Facility
Price (G)
Upkeep (G)
Boost to:
Unlock
Notes
Field
Facility
Path
1,000
∅
∅
Initially Available
∅
Sunflowers
17,000
∅
Harvest
Appeal
Automatically unlocks on Y1 M6 W1
Boost Appeal of nearby facilities. Boost field harvest in Summer.
House
10,000
150
∅
Initially Available
A worker's house
Flower Field
10,000
300
Fertility
Appeal
Initially Available
Boost field Fertility and facility Appeal.
Forest (4 trees)
10,000
∅
Fertility
Appeal
Initially Available
Boost Fertility of nearby fields. Boost Appeal of nearby facilities.
Forest (7 trees)
15,000
∅
Fertility
Appeal
Initially Available
Boost Fertility of nearby fields. Boost Appeal of nearby facilities.
Cherry Trees
25,000
∅
Harvest (Spring)
Appeal
Boost Appeal of nearby facilities. Boost field harvest in Spring.
Pine Trees
45,000
∅
Harvest (Autumn)
Appeal
Boost Appeal of nearby facilities. Boost field harvest in Fall.
Bamboo
33,000
∅
Harvest (Winter)
Appeal
Boost Appeal of nearby facilities. Boost field harvest in Winter.
Greenhouse
50,000
2,500
∅
Investment
Surrounding fields can be harvested year round.
Sprinklers
90,000
4,000
∅
Investment
Irrigate nearby fields via a water pipe.
Drainage Pump
92,000
4,000
∅
Investment
Gets rid of excess moisture
Robot House
125,000
10,000
∅
Investment
A secret robot control base. Sends out radio waves
Bridge
250,000
∅
∅
Investment unlocked after buying land with river
Lets you cross a river.
Scarecrow
12,000
400
Harvest Amount
∅
Boost harvest amount in nearby fields.
Well
11,000
600
Moisture
∅
Investment
Uses underground water to boost moisture in nearby fields.
Hill
300,000
∅
Fertility
Appeal
Investment
A small stretch of elevated land.
Mountain
500,000
∅
Fertility
Appeal
Investment
A small mountain range.
Facilities[]
Image
Facility
Price (G)
Size (Sq.)
Upkeep (G)
Effect
Unlock
Description
Pop
Appeal
Jizo Statues
12,500
1
300
+3
+5
Initially Available
Unmanned Shop
15,000
1
350
+6
+5
Sells veggies to tourist.
Photo Panels
18,000
1
500
+7
+4
Investment
Stick your head in and say cheese.
Bio Lab
100,000
1
5,000
∅
∅
comes with land
Uses biotechnology to extract components from fields in 4 surrounding squares.