Story highlights Government holds illegal wildlife specimens at unique warehouse

Pencil holders made from baby rhino hooves, tiger heads are among items

Illegal animal trafficking is a multibillion dollar business

(CNN) Not far from Denver's abandoned Stapleton International Airport sits what's probably the saddest, most macabre collection of property owned by the U.S. government.

Officially, it's called the National Wildlife Property Repository.

In reality, it holds thousands of confiscated animal items that Americans and others have tried to illegally import into the United States.

There's shelf after shelf of tiger heads, and even a stuffed tiger fetus.

There are tons of crushed ivory, bizarre and worthless medicines made from illegally poached and imported animals.

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