From this videoconference talk from 20 December 2019, Ajahn Anan discusses the veneration of chedis (stupas) and other holy sites.
An excerpt: "We venerate the Maha Bodhi tree where the Buddha attained enlightenment, the requisites of the Buddha, of which the important ones are the bodily relics of the Buddha that are still in this world, like the hair relics, or his bone relics. When we recollect these as Buddhanusati, we recollect the virtues of the Buddha – the virtues of great wisdom, great purity and great compassion – then our minds will feel joy and will have feelings of inner peace and happiness."
Note: One can read Dhamma talk transcripts at the Wat Marp Jan 'Reflections' page. These include questions and answers with Ajahn Anan, which are not in the audio files. See this talk's transcript at: https://watmarpjan.org/en/veneration-of-chedis-and-other-holy-sites/