On the coast of the ancient city of Aegina in Greece, there exists a bottomless pit. Whenever the tide rises, the surging sea water rushes into the pit like a tidal wave, creating a swift current. It is estimated that over 30,000 tons of seawater flow into this bottomless pit daily, yet despite the passage of many years, it has never overflowed.
The existence of this bottomless pit has raised many questions. Some speculate whether it is similar to the funnels, shafts, or sinkholes found in limestone regions, which cannot be filled. However, such terrains usually have an outlet, and no outlet has yet been discovered for the bottomless pit on the coast of Aegina.
In 1958, the American Geographical Society sent an expedition to uncover the secret of this bottomless pit. They employed a dye test, introducing a deep-colored dye that does not easily fade into the seawater to observe how it flowed into the pit. However, despite their thorough examination of the nearby waters and the rivers and lakes on the island, they found no traces of the dyed seawater.
To further investigate, they developed light rose-colored plastic particles. These particles are lighter than seawater, allowing them to float on the surface without sinking and making them resistant to dissolution in seawater. On one occasion, the expedition poured 130 kilograms of plastic particles into the seawater, hoping to find even a single trace of the particles, but after a long year of searching, they found no signs at all.
To this day, the true fate of the bottomless pit remains a mystery.
