New art at zoo can be found in unlikely place: Restrooms 

The front of each stall door in the new restroom facility near Duck Lake features the face of a rhino, zebra, mandrill, okapi, tiger or peacock. The corresponding backsides of those animals grace the interior sides of the stall doors.

Zoo officials have christened the new facility "When Nature Calls."

In addition to the artistic renderings, the facility features environmentally friendly, low-flush toilets.

Houston Zoo director Rick Barongi said he got the idea for the restrooms from the Denver Zoo. So far, the facility has gotten rave reviews from those needing a potty break. Kids, especially, squeal with delight.

"It's fun. It's quirky," said Barongi. "I don't think it will be insulting for people. It's not like someone mooning you."