'My bathing beauty': Ashley Hart shows a hint of side-boob as Renee Bargh snaps her

They've been holidaying in Mexico and documenting their travels on social media along the way.

And on Monday, Renee Bargh took to Instagram to share a cheeky snap of her best friend and fellow Australian, Ashley Hart, who was enjoying a bath from their beachside hotel in Tulum, Mexico.

Ashley, 27, appeared to be naked in the photo, showing a hint of side-boob while facing away from the camera, her blonde locks tied up in a messy bun.

The intimate snap was captioned: 'My bathing beauty @ashleyhart1111 The @azuliktulum is an incredible ecological resort.'

Renee, 29, added: 'The Mayans considered the cenote water to be sacred water, therefore every time you take a bath in Azulik you are bathing with sacred water. Which has great cleansing properties for the skin.'