Ngoc Son Temple (Đền Ngọc Sơn), or Temple of the Jade Mound, is located on a small islet at Hoan Kiem Lake in the City of Hanoi. The temple was founded in the 14th century but most of its current structures were built in the 18th century.
Ngoc Son Temple was built to commemorate a few Chinese and Vietnamese legends, including famous Vietnamese General Trần Hưng Đạo who twice led the Vietnamese troops to fence off the mighty Yuan invaders in the 13th century.
Sharing a few photos of the temple below, taken during my Hanoi trip in July 2008. It’s a small temple, but pretty nostalgic with a serene environment…

Ngoc Son Temple as viewed from across the Hoan Kiem Lake

Main entrance to the Jade Mound and the temple
An incense vessel just outside of the main temple building
A Vietnamese lady in Aodai (traditional Vietnamese dress) entering the temple
Morning Sunlight Bridge (Thê Húc) which connects the islet to mainland