Night tours at relics and heritage sites are gradually more popular these days. But a night tour is still considered a new thing compared to a day tour. In Hanoi, two new tours that have received great attention recently are night tours, with one at the Thang Long Imperial Citadel and the other at the Hoa Lo Prison. In the night tour with the name "Decoding the Imperial Citadel of Thang Long", visitors can “travel back to the past” to see the ancient royal space. Also, they can offer incense to the 52 ancestors at Kinh Thien Palace, and see the collection of antiquities discovered at the Imperial Citadel. The night tour at the Hoa Lo Prison has the name "Sacred Night 2: Living like flowers." On this tour, visitors have a chance to learn more about the heroic history of this relic thanks to the re-enactment of the fighting spirit of Vietnam's revolutionary soldiers, especially female ones. When the sun no longer illuminates the entire space of the Hoa Lo relic, each stop in the tour is lit by a special lightning system, accompanied by sound effects and emotional narrations./.