The Bermuda Triangle is a loosely defined area in the North Atlantic Ocean where many ships and planes have reportedly disappeared. The exact boundaries of the region are disputed, and it's not officially recognized on any world map, making it the biggest mystery of the world.
The world is 70% ocean, and only 20 % of it has been explore. The deep sea is still unexplored and no one knows what lies there
The mystery of pyramid construction, particularly the Great Pyramid of Giza, revolves around how ancient Egyptians moved and placed immense stone blocks, without any machines.
The vastness of the universe and the potential for life to arise on other planets makes it a strong possibility that aliens do exist somewhere in space.
The Tunguska event, a massive explosion that occurred in 1908 near the Podkamennaya Tunguska River in Siberia, is a mystery because it flattened an estimated 80 million trees over a vast area but left no impact crater, and the object responsible for the explosion has never been found.
There are many theories and religious texts that say that there is life after death, but there is no evidence to prove it.
The Mayans were very evolved in terms of technology, architecture and science, but suddenly the Maya Civilization ended. Scientists till today haven't figured out how it ended.