Few visitors come to Chiang Mai, Thailand’s North, expecting to spend half a day inside a museum without walls.
There are no galleries, nor any display cabinets – let alone “Do Not Touch” signs. A dense green canopy stretches overhead while towering trunks rise from carpets of moss. Dragonflies and butterflies skim across ponds. From time to time, visitors see birds chatter in the branches.
Hidden in San Phi Suea, the city’s northern suburbs, Changthong Heritage Park is Thailand's first museum dedicated to ancient and rare trees. Spread across 30 rai (12 acres), it preserves more than 2,000 specimens representing over 400 species. Many trees here were rescued from farms, forests and local villages across Thailand just before they were cleared for agriculture and construction. Some have stood for centuries. They survived because someone believed
these trees deserved a second life.
A Forest Curated Like an Art Gallery
When visitors arrive at Changthong Heritage Park, they will quickly realise that it is not an average botanical garden. Trees are not arranged by scientific family or geographic region. But they are composed (or curated) much like works in an outdoor gallery – where character, age and sculptural beauty play the main roles.
The first surprise is a giant phayom (White Meranti) tree whose trunk bulges with enormous burrs. What foresters might once have dismissed as imperfections are celebrated here as the marks of survival—living evidence of decades spent adapting to drought, storms and changing landscapes.
Further along, a tunnel of red melaleuca trees forms a cool green corridor before opening onto one of the park’s most extraordinary collections.
Around a broad pond stand more than 200 coconut palms unlike any found on tropical islands and beaches. Some divide into several crowns, while others branch unexpectedly from their trunks. Many twist into spirals or sweeping curves created by rare genetic mutations rather than careful pruning. The effect is surreal.
Nearby, towering teen ped phru, native to Thailand's freshwater peat swamps, spread elegant buttress roots across the forest floor. Moss-covered rocks, ferns and a gentle cascade recreate the atmosphere of ancient woodland.
Towards the end of the trail, rows of majestic krabok trees (wild almonds) rise like cathedral columns, their enormous buttressed bases recalling elephant feet or ancient temple foundations. Together they transform a simple walk into something closer to wandering through a natural sculpture park.
The Vision Behind the Forest
After wandering among the trees, the philosophy behind the park begins to emerge.
Changthong Heritage Park is the life’s work of landscape architect Boonrak Thancharoenrot, one of northern Thailand's best-known specialists in mature tropical trees. Over more than 30 years, he has shaped landscapes across Chiang Mai while contributing to projects ranging from Hong Kong Disneyland and Singapore’s Sentosa Island to the Royal Botanic Gardens, Kew, near London. Yet Changthong Heritage Park is his most personal creation.
For years, Thailand’s gardens have often borrowed inspiration from Japanese courtyards, English country estates or Balinese resorts. Here, Boonrak created a different one: a landscape language rooted entirely in Thailand's own native trees.
The collection took more than two decades to assemble. Many specimens were relocated from rice fields, village commons and forests where they were at risk of being felled. Rather than allowing centuries of natural history to disappear, the park gives these trees another landscape to continue growing.
What begins as a leisurely walk through an attractive garden slowly unfolds into something more meaningful: a powerful reminder that conservation starts not with fences, but with appreciation.
Seeing Thai Trees Differently
The longer visitors stay, the more they begin to notice.
The deep fissures of bark. The impossible twists of a coconut trunk. The way lichens colonise ancient wood. The architectural sweep of buttress roots. Trees that might once have been passed without a second glance become individual works of natural art.
Allow at least three hours to explore the grounds at an unhurried pace. A skywalk offers views across the canopy, while Spiral Coco, the park’s glass-walled café, provides a peaceful place to linger over coffee surrounded by greenery.
The Green Season is perhaps the ideal time to visit. Rain intensifies every shade of green, birds become more active and the forest feels almost luminous beneath the filtered light.
Changthong Heritage Park might call itself a museum, but unlike conventional museums its collection continues to grow. Every season adds another ring beneath the bark, another branch to the canopy and another chapter to the lives of trees that have already witnessed centuries of Thailand's history.
Visitors leave having discovered more than an unusual attraction. They see Thailand’s living tree heritage.
