A shell structure is just made of a thin, curved outer layer and it’s hollow inside. Like this, or this, or this, or this. A shell structure doesn’t need any kind of frame and it can be very ...

A shell structure has a thin curved outer layer and is hollow. These structures often are used to hold or protect something. They usually have only a small number of joins or no joins at all.

Explore one of China’s most breathtaking architectural landmarks — a modern opera house featuring the world’s largest shell ...