The 7 most extravagant car interiors in the world

• Automotive companies are working harder than ever to appeal to an exclusive, wealthy clientele.
• They are pushing the boundaries of what "luxury" means.
• Some features include hot stone massage chairs, top-of-the-line entertainment systems, and even art gallery spaces.

While there seem to be an endless amount of exciting, over-the-top car exteriors, we rarely see any of the extreme interiors to match. Besides custom leather and heated seats, most luxury car interiors don't have anything new and exciting to offer.

Some cars, however, take the idea of a luxury ride to the next level. We rounded up some of the cars with the most insane interiors to see just how over-the-top these luxury cars can get.