House of Opium

House of Opium is a small, privately-owned museum in the centre of Sop Ruak village, on the hill next to Wat Phra That Phu Khao and roughly 100 metres south of the Golden Triangle Monument. It’s easy to confuse with the much larger, government-run Hall of Opium about 2 km away — the two are separate institutions with separate collections, and this page covers the smaller original.

Patcharee Srimattayakul, born in Chiang Saen district, opened the museum in 1989 to document the opium trade that once defined this stretch of the Golden Triangle. Researchers from Mahidol and Chulalongkorn universities helped translate and contextualise the displays. The collection runs to more than 2,000 objects — some over 200 years old, gathered from Thailand, Laos, Myanmar and China — including opium pipes, weighing scales, and processing tools laid out across a single building. A second-floor section, less commonly mentioned in write-ups, covers marijuana and tobacco use in the region with over 200 pipes and bongs on display.

Insider Tip: If you’re also visiting the Hall of Opium, do House of Opium first — it’s a fraction of the size and price (50 THB vs 200 THB), and seeing the smaller collection first makes the government museum’s scale easier to appreciate rather than the reverse.

The museum sits within easy walking distance of the Golden Triangle riverbank viewpoint and boat pier in Chiang Rai province, making it a natural add-on to a Golden Triangle stop rather than a standalone destination.