Lotte World Adventure

Seoul's downtown theme park, an indoor rink under glass and a castle on the lake.

A massive theme park in Jamsil, half under a glass dome and half on an island in Seokchon Lake.
The indoor half runs in any weather around a central ice rink; the outdoor Magic Island castle holds the bigger coasters.
A one-day pass covers all the rides, and queues are shortest on weekday mornings.
It sits on top of Jamsil Station, next to Lotte World Tower.