What is a common feature of mausoleums?

Mausoleums are specifically designed structures that serve as a final resting place for the deceased, and one of their most notable features is their elaborate architecture. This includes ornate designs, decorative stonework, and sometimes intricate sculptures or carvings. The intention behind such architectural detail is not only to honor the deceased but also to create a lasting memorial that stands out within a cemetery or burial ground. This feature often reflects cultural or historical significance, showcasing craftsmanship and artistic expression.

The other options present characteristics that do not fit the common understanding of mausoleums. For instance, mausoleums can accommodate various types of remains and are not limited to cremated remains. They are typically built above ground rather than underground, allowing for easier access and visibility. Furthermore, mausoleums can be found in both urban and rural settings, making location not a defining characteristic. Thus, the correct answer highlights the distinctive and often ornate architectural features that are synonymous with mausoleums.