The Baha'i Gardens in Haifa and Acre, the tombs of the Bab and Baha'u'llah are unique places of worship where a mere mortal can come any day (and for free), and a follower of Baha'i - once in a lifetime and with a pilgrimage. I could say a lot about Bahaism, but wait another 800 years and you will see everything for yourself.
Quote from the UNESCO website: "The Baha'i Holy Sites in Haifa and the western Galilee are listed as evidence of a long tradition of Baha'i pilgrimage and for their deep significance for the faith. The site includes 26 buildings, monuments and hillforts, forming eleven separate complexes in Acre and Haifa All of them are associated with the names of the founding fathers of the cult.The shrine of Bahá'u'lláh at Acre and the mausoleum of the Báb, among others, are also located within the site. and research centers.