I visited the Churches of Bucovina on my trip to Romania in 2023. In my opinion it is one of the best WHS in Romania. Are Orthodox churches, colorful inside and outside with frescoes depicting biblical stories. I was able to visit four (Voronet, Humor, Sucevita and Moldovita + the Putna Monastery, which is not a UNESCO Site but is an important pilgrimage center in Romania. Votonet and Humor can be visited by electric bus from Gura Humurului, the rest I stayed at Casa Popa in Gura Humurului where the owner of the house offered to drive his car to the monasteries. I recommend staying at that accommodation. Of the four I consider Sucevita and Moldovita the most favorites.