Imagine surviving scorching deserts, freezing winters, or even dining underground—all while the world above seems uninhabitable. But how do humans adapt to the planet's most extreme climates? From ingenious tunnels to artificial forests, here’s how we’re rewriting the rules of survival—and sparking some controversy along the way.
Sign up for Unlocking the World, CNN Travel’s weekly newsletter (https://www.cnn.com/newsletters/travel?source=nl-acq_article), where you’ll uncover hidden destinations, aviation secrets, culinary delights, and insider tips on where to stay. This week, we’re taking you from the luxurious shores of Turkey to the eerie depths of a Nazi-era castle—plus, a bizarre bikini ban on an Australian bus that’s raising eyebrows.
Canadian winters are no joke, with temperatures in Toronto and Montreal plunging to a bone-chilling -4°F (-20°C). But here’s the ingenious part: locals don’t just bundle up—they head underground. Toronto’s PATH and Montreal’s RÉSO are sprawling subterranean cities where people work, shop, and socialize, completely shielded from the arctic air above. It’s urban living reimagined. Curious? Take a virtual stroll here (https://cnn.com/2026/02/17/travel/toronto-path-canada-underground-networks).
Now, flip the script to Qatar, where summer temperatures soar to a scorching 120°F (49°C). Instead of hiding in air-conditioned malls, residents now wander through an air-conditioned ‘forest’ on Gewan Island. The Crystal Walk promenade, lined with artificial branches adorned with 10 tons of crystals, offers shade and cool breezes. But here’s where it gets controversial: is this a brilliant solution to extreme heat, or a dystopian over-reliance on technology? See it in action here (https://us.cnn.com/travel/gewan-island-qatar-air-conditioned-forest).
And this is the part most people miss: even winemaking isn’t immune to climate change. Yet, in Namibia’s Namib Desert—one of the driest places on Earth—a winemaker is producing award-winning wines. At Neuras Wine and Wildlife Estate, grapes thrive under protective netting, safe from baboons. It’s a testament to human ingenuity, but it also raises questions: can such innovations outpace the climate crisis? Discover their secret here (https://cnn.com/travel/namib-desert-neuras-wine-spc).
Underground Poland: A Tale of Shadows and Salt
First, a sinister story: deep beneath Poland’s Owl Mountains lies a Nazi-era complex hidden within the fairy-tale Książ Castle. Linked to a mysterious Third Reich project—and rumors of a lost gold train—it’s a chilling reminder of history. CNN subscribers can explore this enigma here (https://cnn.com/travel/ksiaz-castle-poland-nazi-tunnels-gold-train).
Just a four-hour drive away, the Wieliczka Salt Mine offers a stark contrast. Part cathedral, part industrial relic, part theme park, this UNESCO site features 150 miles of tunnels across nine levels. The twist? Visitors are encouraged to lick the walls. Yes, really. Dive into this salty adventure here (https://cnn.com/travel/wieliczka-salt-mine-tours-poland).
Luxury Redefined: $50,000 a Night?
Robert De Niro’s Nobu hotel chain is expanding across Europe, with a new opening on Rome’s iconic Via Veneto. But if that’s not extravagant enough, Turkey’s Bodrum Peninsula boasts villas like Villa Maçakızı, where a night can cost $50,000. A-list celebrities flock here, and general manager Andrew Jacobs promises to turn any fantasy into reality. Is this the pinnacle of luxury, or a symbol of excess? Watch the unveiling here (https://www.cnn.com/2026/02/19/business/video/robert-de-niro-nobu-hotels-rome-intl-digvid).
Dining on the London Underground? It’s a Thing.
Eating on the Tube is usually frowned upon, but Supperclub.tube flips the script. Located in a decommissioned train carriage, this unique dining experience serves multi-course tasting menus amid moquette seats and chrome fittings. It’s quirky, it’s bold—but is it practical? Watch the experience here (https://www.cnn.com/2026/02/19/business/video/robert-de-niro-nobu-hotels-rome-intl-digvid).
Bikinis Banned on a Sydney Bus: Too Far?
In Sydney, bikinis have been banned on a local bus after complaints of immodesty. Locals call swimwear “off-putting,” but is this a reasonable request or an overreach? Weigh in here (https://cnn.com/2026/02/13/travel/sydney-beach-bikini-ban-bus-intl-scli).
Italy’s ‘Lovers’ Arch’ Collapses on Valentine’s Day
In a bittersweet twist, Italy’s iconic ‘Lovers’ Arch’ crumbled on Valentine’s Day. A reminder that even nature’s wonders aren’t eternal. Reflect on the loss here (https://www.cnn.com/2026/02/16/travel/italy-lovers-arch-collapses-valentines-day).
What’s Your 2026 Forecast?
As we enter the Year of the Fire Horse, what does the Chinese zodiac predict for you? Check your destiny here (https://cnn.com/travel/chinese-zodiac-predictions-2026-year-of-the-fire-horse).
Final Thought: Is Innovation Enough?
From underground cities to air-conditioned forests, humans are adapting to extreme climates in unprecedented ways. But as we push the boundaries of technology, are we solving problems—or creating new ones? What do you think? Is our reliance on innovation sustainable, or are we merely delaying the inevitable? Let us know in the comments!
