Not only scarce, some of below things might be non existent in the West and only available in Indonesia
Plants
These are plants endemic in Indonesia
Snakefruit
Javanese edelweiss
Raflesia arnoldi
Animals
These are animals that exclusively live in Indonesia
Komodo dragon
Bali Myna
Temples
Indonesia has more than 27,000 Hindu temples, including the ancient ones as well as possibly millions of home temples called sanggah.
Sanggah (home temple in Hindu homes)
Masjids
As the largest Muslim-majority country, Indonesia boasts about 260,000 masjids all across the country.