In ancient times, a journey to Mount Koya, long considered one of the world’s most sacred mountains, could take several days on foot. These days, you can see the UNESCO World Heritage site on a day trip with provided transport (by rail, bus and cable car) from Osaka. This famed Buddhist retreat on the Kii Peninsula is home to more than 100 Buddhist temples. After an authentic Japanese lunch, your guide leads you to Okunoin and Danjo Garan, two of its most beautiful temples surrounded by stunning pagodas, Buddha statues, gates and mandalas.