Neelagiriseya, Buddhist temple in Lahugala, Sri Lanka

Neelagiriseya is a Buddhist stupa in Lahugala, Ampara District, Sri Lanka, and the largest in the Eastern Province. The unrestored mound stands about 22 m high with a circumference of 182 m. Around it, a 2011 survey mapped the ruins of an aramic complex covering about 36 hectares, with scattered building foundations, boundary walls and ponds.

This sanctuary was founded more than 2000 years ago and developed into an important religious center in the region. While the exact dating remains debated, archaeological evidence suggests it was expanded and used during several historical periods.

The name Neelagiriseya means "blue mountain stupa," and the site appears in ancient records as Uttara Seevali Pabbata Viharaya. A 1st-century inscription found in 2011 records a land grant to the temple by Queen Chula Sivalee, wife of King Bhatikabaya.

The site is situated within a forest area and is most easily reached during drier months when paths are not muddy. Sturdy footwear is advisable since the ground can be uneven and partially overgrown.

Excavations uncovered an ancient casket containing Buddha relics that bore inscriptions confirming their authenticity. This discovery provides insight into the religious practices and reverence that pilgrims held for this location in ancient times.