There's a lot we don't know about our beautiful planet and it often leads to captivating or oftentimes creepy discoveries divers wish they left alone. There are still mysteries that revolve around the exploration of outer space and just as much (if not more) of the deep seas and oceans below us. To put things into perspective, around 70 percent of our planet's surface is shrouded in water and according to theclever.com, around 99 percent of the ocean floor remains unexplored. This means that deep-sea divers have a lot to work with when they go exploring.

Until we know all of the answers and secrets to the depths of the Earth's waters, we'll stick with what we know for now; mysterious findings from deep-sea divers that actually have a meaning behind them. The 10 photos below represent items that have been found in the ocean and what their founders think they represent and why they ended up in the ocean. After all, when Mother Nature hits, the ocean floor is the only place some of these strange discoveries can go to for their resting place.

10 Scientists Found These Objects That Turned Out To Work As Solar And Lunar Calendar

These mysterious artifacts found deep at the bottom of the ocean were a puzzle to scientists for years. They couldn't quite figure out which time period these came from and what their purpose was. Eventually, they came to the conclusion that these were an Antikythera mechanism, a device that works as a solar and lunar calendar, thousands of years ago.

9 The City Of Thonis, Often Referred To As Heracelion By The Greeks, Was Once A Bustling City Until It Wasn't

Sometimes referred to as Thonis-Heracleion, this finding was from an ancient Egyptian city located near the Canopic Mouth of the Nile. Based on scientific findings, scientists have theorized that due to natural disasters such as earthquakes and tidal waves, the foundation of the old city couldn't hold and eventually collapsed into the ocean.

This image and article's feature image courtesy of Franck Goddio.

8 Bodies Of Soldiers Were Found Off The Caroline Islands Based On An Attack By Allied Forces In 1944

World War II is a dark piece of our history. It involved most countries around the world and ended in bloodshed and loss. In February of 1944, the Allied forces bombed Chuuk Lagoon in the Caroline Islands. This attack, unfortunately, claimed the lives of hundreds of Japanese soldiers, whose remains were found at the bottom of the ocean.

7 In Michigan Lake, A Professor Found A Row Of Stones Similar To The Famous Stonehenge

While divers were searching for supposed shipwrecks in Lake Michigan, they came across something extremely odd. While the actual Stonehenge stone series lies in England, a strange Stonehenge-structure was arranged 40-feet below the water's surface. These men decided to take sonar scans of their findings and realized these stones had prehistoric carvings on them as well and are well beyond thousands of years old.

6 Artifacts Were Recovered From The Very First Naval Battle Off Of Sicily's Coast

In late 2013, divers found some of the most important artifacts in history off the coast of Sicily. These artifacts were recovered from the site of the first naval battle ever discovered, which dates back to 241 B.C. The remnants were from the Battle of the Egadi Islands, which include helmets, armor, and battering rams, among other miscellaneous items. Somehow these priceless items were never discovered and had lain on the ocean bed all of this time.

5 The Ancient City of Pavlopetriwas Was Discovered In 1967, Which  Sunk Thousands Of Years Ago

In 1967, the underwater city of Pavlopetriwas was finally discovered by divers off the coast of southern Laconia in Greece. This fallen city is more than 5000 years old and it is believed that due to the sea-level changes and other natural disasters, it fell into the ocean beside it.

RELATED: 25 Underwater Cities That Look Straight Out Of Aquaman

4 The Ruins Of Atlit Yam Has A Ritual Site Smack In The Middle Of The Mediterranean Sea

This ancient ruin site was a submerged Neolithic village off the coast of Atlit, Israel. It has been guessed that it's between 8,300-8,900 years old. Among the ruin site lies an odd structure around 1o-acres in size that's set in a stone circle. Archaeologists believe it was used as a ritual site for the villagers.

RELATED: 25 Things Actually Found Underwater By Deep-Sea Divers

3 Countless Japanese Ships And Aircraft Were Found At The Bottom Of The Pacific Ocean After World War II

Fallen ships and airplanes are unfortunately a common thing to find at the bottom of an ocean; but when they're from an important period in history, things get interesting. After World War II, there was a lot to clean up after the bloodshed and war. Specifically, the Pacific Ocean, Japanese aircraft, and ships were found in decent conditions that were assumed lost until 2019.

RELATED: 20 Images Of Sunken Ship Buried In The Deep Sea

2 A 13,000 Year Old Human Skeleton Head Was Found In the Yucatán Peninsula, Mexico

In 2007, a nearly complete skeleton body of a teenage girl was found in a cave in the Yucatan Peninsula. The female died around 12,000-13,000 years ago, based on DNA clues linking her to her Native American ancestors living today. The cave she was found in was presumed to have collapsed on her and 26 other large mammals, including a saber-toothed tiger.

1 Sinking 3,500 Years Ago, The Ancient City of Samabaj's Ruins Were Found At The Bottom Of A Guatemalan Lake

For years there was an urban legend swirling around that a sunken city was lying at the bottom of a Guatemalan lake. In 1996, this fiction was turned into fact. A Mayan village known as Samabaj was actually discovered, dating back to the time of the Mayans. Originally built on an island, it fell into the waters, due to a volcanic eruption.

NEXT: 22 Unexpected Things People Discovered In The Deep Sea