Indoor Hot Tubs
These Indoor Hot Tub pictures will show you some good examples to help you get some good ideas for your own hot tubs and spas.
Here's a round hot tub design with a ceramic tile surround.
Here's an octagon shaped indoor hot tub sunken into a wooden deck.
Here's an incredibly awesome indoor / outdoor hot tub.
Here's a large rectangular indoor hot tub with a brick surround.
Here's a round four person hot tub with a great view.