CHAO MUNG HA NOI !
Visiting the Mausoleum is free of charge but their are some rules to be followed. No short skirts or tank tops are allowed. Taking photos is strictly prohibited inside the mausoleum. Visitors are not allowed to stop and hold the constant queue up as the place is constantly busy. According from the people who have gone to the mausoleum --- every year Uncle Ho's remains are sent to Russia for maintenance.. this happens around October onwards. It is best to check with your tour guide before visiting. I was not able to get inside the mausoleum -- it was closed. Vietnam was celebrating a 4-day holiday at that time. I ended up walking around the complex and moving on to the Ho Chi Minh Museum.
According to our local guide, Tom, if you will look at the roof of this museum... the architecture of the museum's roof has the shape of an opened lotus flower.