- N. Gin Labs
- Cortex Castle
- Hot Air Skyway
- Oxide Station
- Boss: Pinstripe's Challenge (Hot Air Skyway)
- Bonus Arena: Nitro Court
According to the elements from Crash Team Racing Nitro-Fueled, it is possible that architecture of Citadel City is the Cortex Castle which was reformed after the events of in Crash Bandicoot or one of abandoned castles from the medieval era during Crash Bandicoot 3: Warped. Shown by the Dragon on Nitro Court, possibly the castle levels in game Crash Bandicoot: The Wrath of Cortex is part that hub.
In outside, is a medieval castle with towers, hedges, roofs with giant bat statues, chains, spears and cages with chickens trapped. Inside, contains the toxic waste where is the N. Gin Labs, several statues of Neo Cortex and windows with the drawings of Cortex and Uka Uka.
The Pinstripe's 3 blimps fly over the side of the large balcony and Oxide's spaceship on the small balcony.
- At the portal to the Cortex Castle track, surrounding it are stained glass windows with mug shots of the bosses in Crash Bandicoot 3: Warped.
- Citadel City is the only hub world in CTR that has one entrance/exit, that being connected to Glacier Park.
- It's possible this hub is actually Cortex Castle, as hinted by an airship that could be Cortex's, what looks to be Pinstripe's toxic waste dump, and the stained glass windows with mug shots of the Crash 3 bosses.