Before the Taliban's takeover of Afghanistan, Kabul’s main prison was crowded with thousands of Taliban captured and arrested by the former government. Now, on Monday, a Taliban commander strolled through the empty building, showing his friends where he had once been imprisoned.

It was a sign of the sudden and startling new order in Afghanistan after the militant group swept into the capital nearly a month ago and threw out the crumbling, United States-backed government it had fought for 20 years.

The Taliban now run Pul-e-Charkhi Prison, a sprawling complex on Kabul’s eastern outskirts. After capturing the city, the fighters freed all the inmates there, the government guards fled, and now dozens of Taliban fighters are running the facility.

The commander, who refused to give his name, was on a personal visit to the complex with a group of his friends. He told The Associated Press (AP) he had been arrested around a decade ago in eastern Kunar province and was brought to the prison, bound and blindfolded.

"I feel so terrible when I remember those days," he said. He said prisoners suffered abuses and torture. He was imprisoned for around 14 months before he was released. "Those days are the darkest days of my life, and now this the happiest moment for me that I am free and come here without fear," he explained.

Many Afghans as well as governments around the world have been alarmed by the swift Taliban seizure of power, fearing the movement will impose a similar, harsh rule as they did during their first time ruling in the 1990s. But for the Taliban fighters, it’s a moment to savor a victory after years of grueling fighting – and to see a city few of them have entered since the war began.

For some of the Taliban guards accompanying the AP, it was the first time they’d entered the abandoned cell blocks. They looked with curiosity through the cells, still littered with things the last inmates left behind – fabrics hanging from the walls and windows, small rugs, water bottles.

One fighter exchanged his sandals for a better pair he found in a cell. Then he found yet a better pair and exchanged again. Others played with the former prisoners’ makeshift weight bars.

Pul-e-Charkhi had a long, disturbing history of violence, mass executions and torture. Mass graves and torture cells were uncovered dating from the Soviet-backed governments of the late 1970s and 1980s. Under the U.S.-backed government, Taliban prisoners often complained of torture and beatings, and there were regular riots. Still, they kept up their organization behind bars, winning concessions such as access to cellphones and longer time outside their cells. The prison was also in poor condition and overcrowded – its 11 cell blocks were built to house 5,000 inmates but were often packed with more than 10,000, including Taliban prisoners and criminals.

Some of the Taliban now guarding the site were former inmates. The government guards have fled and don’t dare return, fearing reprisals. Though the facility remains largely empty, one section holds around 60 people imprisoned in the past few weeks, who the guards said were mostly accused criminals and drug addicts.