Click and gape at the Vatican's Sistine Chapel ceiling up close. Click again and join thousands of pilgrims praying and circling around the cube-shaped Kaaba at Islam's most sacred site. Or strap on a headset and enter the holy city of Jerusalem.

There you'll hear the murmur of Jewish prayers at the Western Wall or thousands of worshippers saying amen in unison at the Al-Aqsa Mosque. You can even light a virtual candle at the site where Christians believe Jesus rose from the grave.

All without ever leaving home.