These Closed Terrarium pictures will show you some examples and give you some good ideas for your own terrarium.
Here's a large outdoor closed terrarium with a unique look on a large stand.
Here's a closed terrarium in a one gallon glass jug.
Here's a closed terrarium in a cool shaped domed glass holder.
Here are some DIY closed terrariums using common glass jars.
Here's a closed terrarium with a cool green mushroom.
Here's a closed terrarium with a bell shaped glass cover.