“When the park service tells you not to go somewhere, listen to them, especially regarding hot springs in Yellowstone.” -Fantastic_Rock_3836

“The blind spots next to and behind big trucks.” -HawaiianShirtsOR

“Monastery Beach in Monterey, CA. Going into the water can kill you and the waves have pulled people from the shore to their death.” -_zydrate_

“Caves. I know spelunking is a "cool hobby" for some people, just like scuba diving and rock climbing. But things can go so wrong so fast when you're in a subterranean cave, and it can be really difficult for anyone to come rescue you. You can die by falling, by getting stuck, by a cave-in, by getting lost, by getting caught in a flash flood and drowning... Just so many awful ways to die in a cave. (See: John Jones dying in Nutty Putty cave)” -Clara_Coulson

“Old battlefields. You should never cross an an old battlefield even if it’s from decades ago, and seems “safe”. There could be landmines hidden and you could end up with a limb blown off, or dead. It can be very difficult for someone to rescue you because there are landmines and it’s difficult to know where to step, and most battlefields are abandoned or far away from civilization. You can die by being exploded of course, wound infection or bleeding out (if limb was blown off), starvation and thirst. Either way, just don’t do it.” -NimbleVaseline

“Kayaking or any water rafting type sport with amateurs. Many people die due to carelessness or not knowing safety precautions.” -MaximumRabbit5276

“East Saint Louis on any evening when the weather is nice. Even more dangerous on a holiday such as the 4th of July.” -tdfitz89

“Sulfur vents. You get nose-blind to the smell almost immediately. If the concentration gets high enough, you will asphyxiate. If you fall in, you may die from the steam burns, before you asphyxiate, though. Either way, you ain't coming out.” -Sttocs

“Please stay away from rails, people always underestimate how fast trains are.” -RedandAlive

“Low head dams on rivers. They are drowning machines. You fall off the dam, or swim too close the the downstream side where the water spills over- there is a circular current. It draws a person into the water fall; waterfall pushes the down to near bottom and shoots you down stream, but not enough to get out of the cycle. If you lived through it and surface, you are pulled back to the waterfall again.” -Popcorn53

“The parts of Bondi beach that aren't the red and yellow flags if you want to go swimming. Paddling or wading for outside the flags? Sure. Full-on swimming though? You're in dangerous territory for a rip. Be careful when at Bondi.” -Arc_the_Fox

“Anywhere with a floating liveleak logo.” -Aromatic-Car-824

“If your intuition is freaking out, get out. Full stop. Don't worry about what anyone else thinks. Trust thy gut.” -No-Comfortable9850

“If you're in a parking garage, no matter gender, please be careful.” --skyrone

“Somalia. It seems like a no brainer but I have never seen anywhere else on the travel wiki that says that traveling alone is very likely to result in your death.” -TPrice1616

“That one island with the indigenous tribe that will straight up kill you if you set foot on it.” -ItsDanIRL

“Port-a-potties that have been somewhere for A LONG TIME. (I have heard the word "lethal" is appropriate.)” -fanofpolkadotts

“American malls at a black friday sale.” -Sorry_Deer_4162

“Wittenoom. Idiot tourists go there for instagram likes or whatever. There are plenty of perfectly good gorges nearby that aren’t full of the worst kind of asbestos. Sure, I do personally have something against the place, but surely it’s not worth it to go there. The croc in Wittenoom will still be there long after the radiation in Chernobyl has completely faded.” -SilentHuman8

“Any underwater cave. There's gotta be a ton of skeletons in diving gear, hundreds of feet underground, in pitch black. No thank you.” -radio-morioh-cho

“That one small town in the US where the coal mine caught on fire and now the ground is burning forever. They evacuated the place but apparently a few people refused to leave.” -Rainbow_Dash_RL

“The reactor room at Chernobyl.” -Bjarki56

“Don't go swimming in lakes or oceans after dark. It takes surprisingly little for your brain to get confused, illogical and panic. It's also surprisingly easy to drown while in those states.” -NordicShimmer