The brown building is a ghost train. Yes, there are three coasters. Brighton Pier is also the world's largest attraction on a pier, while the world's longest pier is a few hours away in Southend. 
  
The dome is one of two massive amusement arcade things. 
Rides: 
  
-Turbo Coaster (looping coaster) 
-Air Race 
-Crazy Mouse 
-Galaxia (jumping thing) 
-The Booster 
-Twister 
-Wild River log flume 
-Carousel 
-Dodgems 
-Horror Hotel 
-Waltzer 
-Trampolines 
-Cup and Saucers 
-Fantasia* 
-Helter Skelter  
-Gallopers 
-Trampolines  
-Mega Slide  
-Dragon Fly Ride  
- Bouncy Castle 
  
They also had an Air Diver which is now defunct. 
  
Tell me if you would like more pictures.