Our world is full of mysteries, some of which are such that when revealed, our senses fly away. And there are some mysteries that are not revealed, it is good for everyone. Today I am going to tell you about 4 such doors which should never be opened. 

1. The Secret Door of Taj Mahal
 The Taj Mahal, which is considered a sign of love, was built by Shah - Jahan for his Begum Mumtaz - Mahal. It'construction was started in 1632 and completed in 1653. But there are many secrets hidden inside it, if you look from the side of the river, then you will see a busation made of red stone under it. Whose door is sealed but why is it done? But no one knows. Some experts believe that beneath it is Mumtaz-Mahal's tomb and Mumtaz-Mahal's tomb has been designed to escape. While some experts believe that marble has been used in the lower part. And when exposed to carbon dioxide, it can turn into calcium carbonate, causing the entire structure above it to fall down. That's why even opening this door is not free from danger. 

2. The Padmanabha Swamy Temple Vault
 Padmanabhaswamy Temple Vault ( Kerala ) A grand temple that is recognized all over the world. In the year 2011, after the Supreme Court order, 7 doors of this temple were opened. Out of which more than 1 lakh crore treasury came out but the eighth door could not be opened. It had many doors behind the doors and finally the iron door which was made such that it could not be opened. People believe that this door has been closed with mantras. It cannot be opened, a curse that does not leave the person alive, as well as going in is not free from danger. 


3. The Great Sphinx of Giza
 There are great pyramids present in Egypt and together with this is the Great Sphinx of Giza which is an ancient statue. Whose body is that of a lion and face is that of a human being. It is believed to have been formed 4500 years ago. It is hiding many secrets hidden within itself. Actually, in a research conducted some time ago, it was found that there are 2 big swimming pools below this Sphinx. Also the tunes are present but the way to go in them could not be found. There were many claims in which there were talk of having doors near the ears and feet, But the truth could not be revealed to anyone. Historians believe that there can be many such documents of history which can change history. But the secret has been kept on this secret till now. 

4. The Secret Tomb of Emperor
 Qin Shi Huang, the first emperor of China, who made China by uniting 7 states. He always wanted to stay alive, that's why he attacked many princely states. When his grave was excavated a few years ago, it was found that his grave had not been opened since 2000 years. Statues of 'Terracotta Soldiers' were made in it, so far 2000 sculptures have been found. While the Researchers believe there may be 8000 statues here. Each statue has its own facial features and its own distinct attire, while the door leading to the tomb has not yet been opened as there are snares and nets. Also the mercury has been spread everywhere so that no one can enter. Getting inside it can be life-threatening, so it has not been opened yet.