The 33-year-old plummeted at least 30 metres after travelling to a cliff near the village of Nadrin to take photos before 9am.

She slipped on the cliff edge and fell into the Ourthe River, according to the public prosecutor's office.

Emergency services rushed to the scene, as well as scuba divers and a medical helicopter, and her body was later found.

Zoe's heartbroken husband Joeri Janssen - who she met in school and married in 2012 - says his wife "vanished" over the edge of the cliff yesterday, the day before they were due to return home.

"We only left on Sunday in our campervan. Since the pandemic, it was our little thing to drive across Europe in our van and take beautiful photos," he said.

"We got up very early to take pictures of the Herou (a 1,400-metre-high rock face that rises almost vertically above the Ourthe River).

"There is almost always mist there. It's great for photos. We arrived before 9am"