Explore the ancient caves of Hang Son Doong, Vietnam. Hang Son Doong is one of the largest caves in the world and features a fast-flowing underground river. For spelunkers, exploring Hang Son Doong is the equivalent of scaling Mount Everest.
The Monastery of Ostrog is the Serb Orthodox Church placed against an almost vertical background, high up in the large rock of Ostroška Greda. Ostrog Monastery is dedicated to Sveti Vasilije Ostroški – Saint Basil of Ostrog.