Which of the following is NOT a characteristic of a crypt?

The correct answer identifies an option that does not accurately characterize a crypt. A crypt is typically an enclosed space or chamber designed to hold human remains, often located within a mausoleum or a burial place above ground. This makes 'it is generally located above ground' a statement that can lead to confusion, as while many crypts are indeed above ground, they can also be part of structures that provide a below-ground option.

In relation to the other choices, a crypt is indeed used for casketed remains, as it is specifically designed to store such remains securely. Regarding being a garden feature, while some mausoleums or burial sites may be surrounded by gardens, the crypt itself is not a garden feature but rather a significant architectural structure intended for interment. Lastly, the statement regarding crypts being chambers in a mausoleum is accurate since they are often housed within these larger structures, further reinforcing the specific use and architectural function of a crypt in funerary practices. Thus, it is crucial to recognize that a crypt primarily serves as a controlled space for the respectful storage and commemoration of the deceased.