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Deep underground, the Nazis built a city for thousands of soldiers. Now it’s a tourist attraction

(CNN) — In our roundup of travel stories this week: the seven-foot “monster” that stalked West Virginia, the Roman tunnel where a hated emperor nearly met his end, and the enormous bunker city built by Nazis in central Europe.

Poland’s Nazi labyrinth

The countryside around the little Polish village of Pniewo looks serene, with its yellow crops and patches of forest, but beneath the surface lies a sprawling 20-mile maze of tunnels, shafts, underground railway stations and combat facilities.

This is the Ostwall, a fortified subterranean complex built by the Nazis and abandoned in 1945. In the 1980s and ‘90s, a subculture known as the Bunker People took over the tunnels, hosting unauthorized and often dangerous events here, from raves to weddings. Today, bats are its inhabitants, some 40,000 of them taking refuge in the darkness.

In the 21st century, it’s been given new life as a dark tourism destination, with 19 miles of tunnels open to explore in the Międzyrzecz Fortified Region Museum. Read more here.

Rome’s murder-plot tunnel and London’s Cold War spy maze

In Italy, a 2,000-year-old tunnel once used by Roman emperors to slip unseen into the Colosseum will open to the public this month. The 180-foot Passage of Commodus takes its name from Emperor Commodus, who you may remember as the conniving meanie portrayed by Joaquin Phoenix in “Gladiator.” Experts believe he once survived an assassination attempt here. He would later meet his end being strangled by a champion wrestler.

Fans of secret underground complexes will have much to celebrate when The London Tunnels opens in the UK capital, with a speculative date of 2028. This mile-long series of chambers was built to shelter citizens in World War II, before becoming the home of Britain’s Special Operations Executive, an offshoot of MI6 and the real-life inspiration for James Bond’s Q Branch. It’s undergoing a $149 million transformation in hopes of becoming the city’s grandest new tourist attraction. CNN went down below for a sneak preview earlier this year.

Turkey’s ghost town and Iraq’s lost city

Just over a century ago, Kayaköy in southwest Turkey was a bustling town of more than 10,000 people. Abandoned by its occupants and haunted by the past, it’s now a ghost town, a physical reminder of darker times following the Greco-Turkish war.

Its crumbling buildings swallowed by greenery are starkly beautiful and deeply eerie, even more so as the cooler seasons creep in and sea mists descend. Today’s visitors pay a three-euro fee to wander its uneven lanes and alleyways. Here’s what CNN discovered on its visit.

Babylon, in modern Iraq, meanwhile, was the jewel of Mesopotamia and one of the most important cities in antiquity. Today, its ancient ruins are a site in distress, its paths overgrown and facilities scarce. But when the late afternoon sun hangs heavy over Hillah, its steps and statues bathed in heat and light, visitors still feel that they are standing in the footprints of kings.

America’s most haunted

The Trans-Allegheny Lunatic Asylum in West Virginia looks like the asylum of nightmares and for many, it was. But it started out as a place of compassion whose massive overcrowding led to desperate measures by doctors and staff. Daily and nightly tours now offer visitors its complex history, along with an occasional paranormal scare.

Many former asylums are now macabre tourist attractions, whose treatment of their subject matter can range from the sensitive to the sensationalist. CNN delved deeper into the surprisingly hopeful history of asylum tourism in America.

In case you missed it

A ‘monster’ shut down schools in this riverside town in 1967.

Residents still want answers.

How funerals became New Orleans’ most joyful street parties.

Brass music is in the city’s “DNA.”

The surprising origin of Chicago’s infamous ‘rat hole.’

The public got this one wrong.

She’s 94 and dresses in clothes from a bygone era.

Now strangers search for the woman known as “the last queen.”

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Suspect in Berlin ramming attack shot and killed by police, authorities say

The suspect sought in connection with a car ramming attack on a Berlin LGBTQ+ Pride parade that left one person dead and 29 injured was shot and killed in a confrontation with police, a senior police official in Germany told CBS News.The official said the suspect charged towards police with a knife and police opened fire, shooting the suspect. The Associated Press, citing police, said the confrontation happened Sunday in a suburb of the city.Germany's interior minister identified the suspect as 21-year-old Abdul Ballout, a German citizen with Lebanese roots. Authorities believe he may have been motivated by Islamist extremist ideology and sought to join the Islamic State group.Police described him as being part of Berlin's "Islamist scene" and someone who is known to authorities."Everything we see here points to us dealing with an Islamic terror attack," Interior Minister Alexander Dobrindt said Sunday.Dobrindt said Ballout was born in Germany and that his mother was naturalized in 2002, three years before he was born. He said the suspect had been convicted in Berlin in the past.Berlin prosecutors said Ballout shared ISIS propaganda on Instagram in 2024 and the following year traveled to Lebanon "with the intention of proceeding from there to Syria to join ISIS." However, he was arrested and sentenced to three months in prison. He returned to Germany in November 2025 and he was arrested in May for "preparing a serious act of subversive violence," prosecutors said.He was sentenced to a year and ten months in jail, but this was suspended, partially in recognition of the time he had spent in jail in Lebanon and pre-trial detention, and partially because he admitted to the crimes and distanced himself from ISIS, prosecutors said.Police said they believe Ballout rented the vehicle used in the attack but it is unclear if he was the driver. He was described as being of slim build, about 6 feet 3 inches tall, with black hair and wearing a black hoodie with white pants.Police searched an apartment in Berlin's Schöneberg district early Sunday, but said they found no one there. The suspect's heavily damaged vehicle remained at the site of the attack on Sunday morning. Police officers stand near a vehicle crashed into a tree after driving into a crowd near Berlin's annual Pride event, in Berlin, Germany, Sunday, July 26, 2026.  Markus Schreiber via AP Authorities are also working to determine if he acted alone. Investigators believe that one or more people may have left the vehicle after it came to a stop. Some victims also suffered stab wounds, raising the possibility that others were involved in the attack, but authorities have not confirmed that. Dobrindt said the suspect is believed to have injured people with a machete.A man with Iranian citizenship was arrested, but police have not confirmed any involvement in the attack.Chancellor Friedrich Merz vowed that law enforcement would find the suspect."I would like to say this to Christopher Street Day participants here in Berlin but also across Germany: Don't let yourselves, let us not let ourselves, be intimidated," he said Sunday. "These acts have only one purpose: They aim to divide our society. They want to take away from us the most important thing we have: Namely our openness and our freedom."Berlin's fire service said that of the injured, three have life-threatening injuries, eight were seriously injured, and five had slight injuries. Police have not identified the deceased victim. Bouquets, candles and Berlin bears are placed in front of the landmark Brandenburg Gate one day after the car ramming attack on people on the outskirts of Berlin's Christopher Street Day (CSD) parade on late July 25, 2026.
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