Cities: Skylines includes special monument buildings you can add to your city, but only when all requirements for unlocking them are met. To add any monument to your city, you’ll need to reach the Megapolis population milestone and purchase nine map areas. When you’ve done that, monuments become available; but you’ll still need to fulfill their unique building requirements to unlock them. These are the eight Cities: Skylines monuments you can add to a city and what they do.
Read also: 8 Ways to Increase Land Value in Cities: Skylines
Eden Project
The Eden Project is a giant greenhouse structure that increases land value in your city and greatly reduces pollution. Given the importance of land value in Cities: Skylines for leveling up buildings, this is certainly a monument worth adding. It will cost you 850,000 to build the Eden Project. You’ll need to add the following unique buildings to your city to unlock it:
- Cathedral of Plentitude
- Business Park
- Official Park
- Statue of Industry
- Friendly Neighborhood Park
- Statue of Industry
Space Elevator
Space Elevator is one super tourist attraction that will attract hundreds of visitors to your city weekly. So, it’s not that much different from standard unique buildings, except that it attracts many more visitors. Space Elevator is the most expensive monument to build from the base game, costing 1,500,000 million (and it has high maintenance costs to boot). These are the unique buildings your city must include to unlock Space Elevator:
- Opera House
- Stadium
- Expo Center
- Grand Mall
- Transport Tower
- Statue of Wealth
Fusion Power Plant
Fusion Power Plant is a Cities: Skylines monument that gives your city a massive 16.000 MW power output boost. It’s an extremely big energy source that will eliminate the need to add further power generators to your city. You can probably delete many of the old power plants in your city after adding this monument. Fusion Power Plant costs 1,000,000 million to build and has these unique building requirements:
- Tax Office
- Fountain of Life and Death
- Observatory
- Science Center
- MAM Modern Art Museum
- Plaza of the Dead
Fusion Power Plant
Hadron Collider
Hadron Collider is like one big super school for your city that provides one million extra spaces for each education level. This Cities: Skylines monument will probably eliminate the need to build more elementary or secondary schools in your city. It costs 800,000 to build Hadron Collider, and you can unlock it by adding these unique buildings to your city:
- Posh Mall
- Aquarium
- Grand Library
- Theater of Wonders
- Colossal Order Offices
- Statue of Shopping
Hadron Collider
Doomsday Vault (Natural Disasters Expansion Pack)
Doomsday Vault is a monument the Natural Disasters DLC pack adds to Cities: Skylines. This Cities: Skylines monument is one big underground facility that enables your city’s shelters to accommodate more citizens. It also increases the food and storage capacities of shelters. The Doomsday Vault is an expensive monument costing 1,600,000 million to build. You’ll need these unique buildings in your city to unlock it:
- Helicopter Park
- Pyramid of Safety
- Meteorite Park
- Disaster Memorial
- Sphinx of Scenarios
- Sparkly Unicorn Rainbow Park
Doomsday Vault
Medical Center
Medical Center is like one big hospital that can accommodate 1,000 patients and has medical helicopters. Thus, it provides massive healthcare coverage for your city. Medical Center is the cheapest monument in Cities: Skylines that costs 650,000. To unlock it, your city must have these unique buildings:
- Court House
- Lazaret Plaza
- Oppression Office
- Sea-and-Sky Scraper
- Mall of Moderation
- High Interest Tower
Medical Center
Castle of Lord Chirpwick (Parklife Expansion Pack)
Castle of Lord Chirpwick is a historic castle that’s only available to players with the Parklife DLC. This monument enhances the attractiveness of all unique buildings in your city by 25 percent. Plus, it attracts many tourists to your city. The Castle of Lord Chirpwick is the most expensive monument in Cities: Skylines, for which you’ll need 1,900,000 million to build. The unique buildings required for this monument are:
- Observation Tower
- Sea Fortress
- The Statue of Colossalus
- Old Market Street
- Clock Tower
- City Arch
Ultimate Recycling Plant (Green Cities Expansion Pack)
Players with the Green Cities DLC can also add the Ultimate Recycling Plant monument to their cities. This super recycling plant has a garbage processing rate of 480,000 units a week and 100 collection trucks. Your city can export the goods and raw materials Ultimate Recycle Plant produces from recycled rubbish. This monument costs 750,000, and the following unique buildings unlock it:
- Central Park
- Bird and Bee Haven
- Climate Research Station
- Lungs of the City
- Ziggurat Garden
- Floating Gardens
Ultimate Recycling Plant
Those Cities: Skylines monuments are expensive to build, but most are worth adding to your city. Monuments like the Eden Project, Hadron Collider, and Fusion Power Plant are advanced service buildings that offer massive city-wide benefits.
