Chaiyaphruek Khiriwan Cave

 Location - https://maps.app.goo.gl/AfxwQoNQmNb5NUcP8

Chaiyaphruek Khiriwan Cave is located in the hill on the opposite side of  the road to Wat Tham Chaiyaphruek Khiriwan. Take Highway 4 north from Chumphon town for some 58km, turning left onto the road opposite the factory of Sri Trang Gloves (Thailand) Public Company Limited.

The short track up to the cave is on the left 1km down this road.

The cave is Y shaped and goes right through the hill. With the smooth walls this cave was once where a stream flowed through the  hill. 

The left entrance is much larger and the chamber within has been made into a place of worship.

The smaller entrance to the right will lead you too the other opening at the southern end of the hill.

This cave is about 100m long and a third of the way down it meets up with the larger chamber.

The 'Caves & Caving in Thailand' website has referenced this as Cave No. CP0086.