Imagine that you’re swimming out into your local lake. You’re a capable swimmer, you know this body of water like the back of your hand, and you feel confident while athletically stroking through water enveloped by the early morning mist. You decide to dive underwater for a bit—you know, for fun—and that’s when you see it: the shadowy silhouette of something huge, rusted, and covered in seaweed. You panic, rise to the surface, and swim to the shore. Trembling. Terrified.

What even was that?! That, my dear Pandas, was but a taste of submechanophobia, the fear of fully or partially submerged man-made objects, from sunken ships and propellers to sculptures and buildings. The r/submechanophobia subreddit, a vast community of 375k people, is a place to explore that deep, lurking fear in photo format.

Let’s plunge in, shall we? Remember to upvote the pics that scared the bejesus outta ya as you’re swimming through this list. We’d also love to hear your thoughts about the photos, so if you’re brave enough, you can dive to the very bottom and drop us a line in the comment section.

One of the moderators of the 'Submechanophobia' subreddit, redditor Pubocyno, gave us a glimpse into the exciting underwater currents of the community, shared their take on tackling our fears, and revealed the very interesting origin of the phobia itself. Pubocyno told Bored Panda that they're actually a very active wreck diver in their free time! What's more, they create detailed shipwreck maps.

"I like to spend much time underwater. There is this sense of awe when you discover underwater wrecks for the first time, a little bit of excitement and a little bit of terror—not to forget the sense of history, especially in those wrecks you know have had casualties," Pubocyno said that even though they don't have submechanophobia themselves, they nonetheless have a "great respect" for all things underwater. You'll find the moderator's other insights deeper into the article, dear Readers.

#1 Underwater Shark Statue At Lake Neuchâtel

Image credits: 1091drawde

#2 Hurricane Harvey. French Street In Lumberton, Tx. 9/3/2017

Image credits: Axeljurgens

#3 Maryland National Harbor Statue 'The Awakening'

Image credits: Consistent_Bid_7501

The ‘Submechanophobia’ subreddit will be celebrating its 8th birthday on July 10, so if you’re a fan of the uncomfortable photos they post, drop by, say ‘hi,’ and congratulate them. Just… don’t forget your diving gear, powerful waterproof flashlight, and harpoon. Just in case the underwater objects are haunted or decide that now’s the perfect time to come alive.

Moderator Pubocyno is very dedicated to the subreddit. They do their best to find a bit more about the shipwrecks that get posted on r/submechanophobia and if they feel satisfied that they've got the right information, they'll add it to one of their shipwreck maps. Pubocyno has made six maps so far and shared with Bored Panda the North European version which you can see in all of its glory right here. Trust us, it's worth taking a peek.

#4 Diving In A Sunken Plane

Image credits: Quinnpill19

#5 The Baltimore Harbor Tunnel Today. Ignore The Fact That You Are Already Driving Underwater. Drive Into The Underwater Water

Image credits: DarkBlue222

#6 German U-Boat Spotted From The Air

Image credits: KingNeptune767

Pubocyno was kind enough to share their take on dealing with phobias like submechanophobia. The moderators actually have very high standards and strict rules for the content that gets posted so that it doesn't trigger a reaction in anyone who is afraid of submerged man-made objects. "we are not about shock content," they said.

"When dealing with any sorts of phobia, the important must be understanding why you are afraid, not necessarily what you are afraid of, although they two can be connected. As always, proper mental health workers are to be recommended instead of the advice of strangers on the internet if someone experiences serious problems," the moderator detailed. "To support those who are haunted by these sort of images, we crack down on staged or otherwise unreal content and demand posts have some sort of cohesive title."

#7 Swimming Pool Aboard A Decommissioned Soviet Typhoon Class Submarine

Image credits: BigCheemus

#8 Dragon Sculpture In The Lake Of Neuchâtel, Switzerland

Image credits: Av3le

#9 It Seems People Enjoyed My Last Post- Here Is Another One I Took Of The Coast Of O’ahu, Hawaii, Where A Tourist Submarine Came Upon As Out Of The Void While We Were Diving...

Image credits: lindirofkells

The moderator also gave Bored Panda a glance at the subreddit's history. The current moderators weren't present when r/submechanophobia was founded and they don't really have any communication with the community's creators. According to Pubocyno, the original founders thought that the idea to create a subreddit about submechanophobia was a good one and, once the community "gathered too much steam," they left to pursue other projects.

"Interestingly enough, we are unable to find mentions of the term 'submechanophobia' that predates the subreddit (2013), so although we have no proof, we like to think we were the instigator of the term. The internet has redefined the term a bit differently than we use it in-house, however," the moderator noted that the subreddit may very well have created the term itself that then spread to other corners of the net.

A part of submechanophobia is that people are scared that they’ll be sunk into the man-made objects or that dead bodies or even dangerous creatures could suddenly appear out of them. What’s more, some people are scared that the objects themselves might be haunted by ghosts or spirits. It’s easy to laugh at this when it’s sunny and we’re on dry land though, isn’t it?

#10 Silver Islet Mine Shafts Near Thunder Bay On

Image credits: justjbweldit

#11 Retired NYC Subway Car Dumped Off The Coast As An Artificial Reef

Image credits: R3dSh1ft_706

#12 What A Submarine Escape Training Tower Looks Like

Image credits: Dracula24

Let’s face it, most of us have at least one phobia in our lives. Some might be secret, others will be well known to our closest friends and family members. For instance, I’ve got acrophobia or the fear of heights. I know it’s irrational. I know that it’s usually silly for me to panic. But when I end up in a very high place, I’m terrified. Especially if my friends are doing dumb things like leaning over the edges just to annoy me. Paradoxically, I absolutely love flying.

So considering that we’ve got our own phobias to deal with, submechanophobia doesn’t seem all that silly. After all, it’s one thing to look at some photos of submerged objects from the safety of our own homes, schools, or offices; it’s a completely different ball game to be underwater, in the silence, and see a shadow rising out of the depths. It’s eerie. It’s scary. And I’m betting that some Pandas (me included) will be having nightmares about this in the days to come.

#13 This Picture From A Forbes Article On Nuclear Power

Image credits: Phagemakerpro

#14 Serpent D'océan In Saint-Brevin-Les-Pins, France

Image credits: arbalm

#15 Water Reservoir In Emmendingen, Bw, Germany

Image credits: Trizocbs

The fear of submerged man-made objects is closely linked to thalassophobia, the fear of deep bodies of water, from the ocean and the sea to lakes and even pools. If you’ve got thalassophobia, you could be scared of being in deep bodies of water, afraid of how vast and empty the ocean is, frightened of waves or creatures living in the water, or even scared to get too far away from the shore.

Part of this fear could be explained by our evolution (i.e. human beings don’t breathe underwater and can’t survive while on water without a lot of help), however, researchers are still unsure of the precise causes of thalassophobia.

#16 A Full Tokyo Flood Shaft. The Shaft Is Around 230 Feet Or 70 Meters Deep

Image credits: Where_Lions_Roam

#17 Cancun Underwater Museum

Image credits: roboflav

#18 Aft Ballast Tank On My Ship. Had To Dewater And Inspect It

Image credits: Cornholiolio73

Some of the ways to treat thalassophobia and submechanophobia include applying cognitive behavioral therapy, systemically desensitizing the patient to their fears, using exposure therapy, and even using medication if the symptoms are very strong and persistent.

A combination of all approaches seems to work best. What’s more, treating the phobia in question is best done in childhood, before it takes root... and drags you down to the underwater abyss.