Apple's new "Mothership" Campus.

If you thought your new office looked ultra-modern, wait until you get a peek at Apple’s next campus in Cupertino, California.

Dubbed the “Mothership” by Cupertino Mayor Gilbert Wong, Apple has submitted architectural renderings of a 2.8 million square foot campus -- built on 176 acres of land – and capable of housing roughly 13,000 employees.

It is said to be built by 2016 with an estimated budget of $5 billion.

While initially presented to the city in 2011 by late Apple CEO Steve Jobs, Wired has just published updated information and renderings of “Apple Campus 2,” approved by city officials last month, says writer Kyle VanHemert.

All 28 images can be seen by clicking the image below.

The latest images show a number of areas of the futuristic-looking corporate headquarters, including a donut-shaped main building – designed to promote collaboration among employees – lined with floor-to-ceiling concave glass walls, plenty of flora and fauna, and powered by renewable energy (“on-site fuel cell plants and rooftop photovoltaic arrays,” says the Wired piece).

The latest renders show an underground auditorium (perhaps to host media events at product launches), a massive 90,000 square foot open-concept cafeteria that extends outside and a “Corporate Transit Center” bus depot to drop off and pick up employees.

There’s also a concept of a subterranean tunnel that leads to a 2,000-space parking garage. Separate research and development facilities will be outside of the main four-story “spaceship” campus.

Renowned architect Norman Foster is at the helm of the ambitious project, but Jobs was “heavily involved” in the earlier stages, says Wired.