SARA Underwood’s travel adventure Instagram posts have gained an army of fans – and not just for the scenery.

aaThe busty blonde regularly strips down to her underwear – or nothing at all – while posing for sexy shots in exotic locations.

ffAnd the stunner was at it again when she decided to shoot a video of her trip to Columbia River Gorge and an amazing waterfall.

hkThe former Playboy model decided to wear a skimpy yellow two-piece bikini.

But disaster struck as the combination of the water cascading over her body and the cool air meant her nipples were clearly visible through her top.

foYet Sara didn’t seem to mind as she enjoyed the refreshing shower before sauntering through a cave – giving viewers a prime view of her enviable behind.

She captioned the video: “Might be the coolest waterfall I have come across yet. Waterfall + tunnel.”

trBut viewers seemed more impressed with her body than the natural feature.

“There’s a waterfall?,” one joked.

Another added: “An angel is walking at paradise.”

And a third said: “Damn wish i was on that hike.”

She’s not the only one getting attention on her travels after a babe’s snorkelling trip video proved very popular for an obvious reason.