The following is a possible concise summary of the text:
A group of travelers visit an abandoned private psychiatric hospital in Nicaragua, where a wealthy woman used to live with her mentally ill granddaughter and other children. They explore the huge mansion and find evidence of the children's presence, such as paintings on the walls and graves in the garden. They also notice bars on all the windows and doors, which make them feel trapped and scared. They plan to spend the night in one wing of the house, which is supposedly available for living, but they encounter some strange and creepy events, such as doors closing by themselves and a white dove sitting on a window. They film everything on camera and ask their viewers to like and subscribe to their channel. They also wonder if they can sneak into the central tower, which is under renovation and off-limits.
Here are some possible key facts extracted from the text:
1. The text is a transcript of a video by Alex Amaral, a YouTuber who explores paranormal and mystical places.
2. The video is about a private psychiatric hospital in Nicaragua, where a wealthy woman took care of mentally ill children, some of whom died and were buried on the property.
3. The hospital is a huge mansion with bars on the windows, fountains, gardens, and a pool. It has been abandoned for 30 years and is now being renovated.
4. Alex and his girlfriend Vera have access to the left wing of the mansion, where they plan to spend the night or more. They are also curious about the right wing and the central tower, which are off-limits.
5. They find evidence of children's drawings on the walls, old furniture, moldy mattresses, and strange smells. They also notice a white dove sitting on a window and wonder if it is a sign of something supernatural.