"At her age, she looks unbelievable, she's got so much confidence.

In it, a man can be seen using a type of post to knock out a lower wall, revealing a dark space behind.Other footage has shown prisoners being freed - including a small child being held with his mother. He is shown in a video of women being released that was posted by the Turkey-based Association of Detainees and The Missing in Saydnaya Prison (ADMSP).

"He [Assad] has fallen. Don't be scared," a voice on the video says, apparently trying to reassure the women that they were now safe.Video verified by AFP showed Syrians rushing to see if their relatives were among those released from Saydnaya, where thousands of opposition supporters are said to have been tortured and executed under the Assad regime.Rebel forces have swept across Syria, freeing prisoners from government jails as they went.

Throughout the civil war, which began in 2011, government forces held hundreds of thousands of people in detention camps, where human rights groups say torture was common.On Saturday, the Islamist militant group Hayat Tahrir al-Sham (HTS) said it had freed more than 3,500 detainees from Homs Military Prison as the group took over the city.

The group was set up in 2012 under the name al-Nusra Front. It was allied to al-Qaeda but later severed ties - though the US, the UK and a number of other countries continue to see it as an affiliate of the jihadist organisation.

In 2016, the group took its current name, HTS, and later merged with other rebel factions. It is the most significant of several opposition groups taking part in this latest offensive."It can be extremely dangerous," he said.

"The water can get very cold, water from the reservoir pours over the dams when it's been raining."Other residents asked how someone could get there with no obvious means of transport, and why his belongings would not be found on the shore.

Rosemary Stow, who runs craft gallery Quillies, said most tourists do not make it past the visitor centre in the nearby Elan Valley."You don't see a lot of cars up at Claerwen dam or in the car park below, it is such a lonely place," she said.