A rock formation becomes a natural waterpark when monsoon rains fall.

Footage shows the delighted tourists riding down their makeshift slip-and-slide at the Tham Phra waterfall in Bueng Kan province, Thailand, on September 9.

The water cascaded down eroded river rocks and built the awesome slides which people visit after a storm for stronger currents.

Holidaymakers would gather on the banks and sit together on the path of the surge to push them to the bed before climbing again.

Tourist Kai said: 'It was a big and beautiful waterfall. Everyone should come and experience it. I recommend playing on the natural water slide.'

Tropical country Thailand has more than 1,000 waterfalls, ranging from small cascades to towering giants.