You've probably heard about the dinosaurs in Isaan, but if you haven't been to see them yet, you'd better get a move on - they're not getting any younger.
On the other hand, the bones of meat-eating and vegetarian reptiles that the abbot of Wat Sakawan found in 1993 are 250 million years, so maybe there's no big rush.
Kalasin is the place to be if you want to visit Triassic Park. That's where the government's Mineral Resources Department opened the Sirindhorn Museum last year to house all the fossils dug up around the temple adjacent.
It's supposedly Southeast Asia's biggest geological museum, two storeys laying out the artefacts and the whole history of the world in eight chapters.
You get an early start - five billion years ago watching the Big Bang - and then trace Earth's development and life from minuscule squiggly things on to bugs, beasts, birds and the bloke who lives next door.
The dinosaurs tell their tales through the fossils that came mostly from the site and signs in Thai and English. Some sections have touch-screen information booths and other interactive media.
The Thai dinosaurs are displayed elegantly in complete skeletons in the main hall.
Among them is the world's "newest" dinosaur family - as in most recently discovered.
Siamotyrannus Isanensis - the name mixes "Siam" and "Isaan" - is believed to have been the ancestor of the fierce and famous Tyrannosaurus Rex, and so far it hasn't been found anywhere outside of our own Northeast.
Did you hear a roar?
>> The Sirindhorn Museum is open daily from 8.30 to 5. It's in Tambon Phu Kumkao in Kalasin's Sahasakhan district, Thailand.
