His Majesty The King’s Insect Park

Kasetsart University’s Kamphaeng Saen campus in Nakhon Pathom houses Thailand’s largest insect dome, built in 2003 to mark King Bhumibol’s 72nd birthday. The dome covers more than 1,000 square metres and stands 15 metres tall, sharing the grounds with an exhibition hall that holds specimens from over 1,000 insect species — everything from foot-long stick insects to metallic jewel beetles pinned in glass cases.

Two adjoining exhibition buildings walk visitors through the collection: mounted specimens grouped by order, panels explaining pollination and pest control, and a research wing where staff breed rare and endangered species for conservation study. The dome itself works as a live field-study enclosure — netted overhead to keep specimens contained, planted with the host plants insects need to complete their life cycles, and used for entomology fieldwork by Kasetsart students as much as for public viewing. Paths loop between habitat zones, with the most visible activity around the flowering shrubs that draw butterflies and beetles during the cooler morning hours.

This is a university research facility that happens to be open to the public, not a manicured tourist garden — expect academic signage over polish, and don’t come expecting the butterfly-house spectacle of Bangkok’s dedicated insectariums. Weekday mornings are quietest, before university groups arrive; the dome’s mesh ceiling cuts the worst of the midday heat, though it still runs warm by early afternoon.

Insider Tip: The park closes Saturday and Sunday, unlike most Nakhon Pathom attractions — build it into a weekday loop with Mueang Kao Kamphaeng Saen, the ancient town site on the same stretch of Kamphaeng Saen district.

Getting here means driving onto the Kamphaeng Saen campus itself, about an hour west of Bangkok; there’s no public transport link direct to the dome, so a car, motorbike, or taxi from Nakhon Pathom town is the only practical option. Bring insect repellent for the planted areas and comfortable shoes for the walking loop through the dome interior. Because it’s a working research centre rather than a commercial attraction, hours can shift around university holidays and exam periods — a quick call to 0 3428 1066 before a special trip is worth it.