The first photo is the stupa north of Questa and the second is a stupa in Crestone, Colorado with the San Juans in the background. All are worth visiting if you are interested in circumambulations and gaining merit…or peace of mind. Eric Ming credit
A stūpa is a mound-like or hemispherical structure containing relics that is used as a place of meditation. A related architectural term is a chaitya, which is a prayer hall or temple containing a stupa.