Find the best alcove bathtub for the perfect bathroom design for your home. Alcove Bathtubs are typically built-in on 3-sides to create a seamless design. An alcove tub is seen as the standard in bathtub models and is typically outfitted with a shower. Chose a decorative front panel or keep it simple with a flat front bathtub. This style of bathtub is very versatile and great for smaller bathrooms.