Mound-like structure containing Buddhist relics, used as a place of meditation
In Buddhism, a stupa (Sanskrit: स्तूप, lit. 'heap', IAST: stūpa) is a mound-like or hemispherical structure containing relics (such as śarīra – typically the remains of Buddhist monks or nuns) that is used as a place of meditation. Circumambulation, or pradakhshina, has been an important ritual and devotional practice in Buddhism since the earliest times, and stupas always have a pradakhshina path around them. The original South Asian form is a large solid dome above a tholobate, or drum, with vertical sides, which usually sits on a square base.
https://en.wikipedia.org/wiki/Stupa