Perhaps there is no place that is more of a treasure-trove of Western Christian art than the Vatican City. The works of great Renaissance artists such as Michelangelo adorn the chapels and haunt the recesses of the Vatican so that the entirety of the Roman Catholic compound is a work to behold. Now, thanks to the Vatican Museum, you can tour virtual renderings of several areas of the Vatican online, such as the Sistine Chapel and Pauline Chapel, allowing you to see the extent of their extensive frescos and sculptures. Amidst all this, you are accompanied by some beautiful music to set the mood.
(There is also a very impressive guided tour of the Vatican Necropolis, the very bowels of St. Peter’s Basilica, featuring the original tomb of St. Peter.)