Found的过去式形式是found。作为文章标题，可以使用如下格式：“Found: [主题]”。下面是一篇符合要求的全文：

Found: The Lost City of Atlantis

Atlantis, the legendary lost city, has been a mystery for centuries. The story goes that it was a prosperous civilization that mysteriously disappeared without a trace. But now, new evidence has been found that suggests the city may have actually existed and could be located off the coast of Spain.

The search for Atlantis has been ongoing for many years. Many theories have been proposed, but none have been proven. However, recent discoveries have shed new light on the possibility that the city could have existed.

In 2011, archaeologists found a large circular structure in the waters off the coast of Spain. They believed it was a possible site for Atlantis and began investigating further. The structure was estimated to be over 4,000 years old, which would make it one of the oldest known man-made structures in the world.

Further research revealed that the structure was made of a material that was not commonly used in that time period. This material was unique and had never been seen before. This led researchers to believe that the structure was built by an advanced civilization.

The discovery of this structure has reignited the search for Atlantis and many experts now believe that it could be located off the coast of Spain. However, the search has been hampered by several factors, including the depth of the water and the difficulty of extracting artifacts from the site.

Despite the challenges, there is still hope that Atlantis will be found. In recent years, new technologies and methods of exploration have been developed that could help uncover the truth about this enigmatic city.

In conclusion, the discovery of the circular structure off the coast of Spain is a promising development in the search for Atlantis. While there is still much work to be done, the potential discovery of one of the most fascinating lost cities in history is an exciting prospect.

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