History & story.
Hoan Kiem Lake was originally named Luc Thuy — Green Water Lake — a name given during the Ming dynasty's occupation of Dai Viet, and only became 'Hoan Kiem' after Le Loi's victory in 1428. Legend holds that the Divine Turtle lent Le Loi a magical sword for his 10-year resistance campaign, and after reunifying the country, as the emperor sailed on the lake, the Turtle surfaced to reclaim the sword — the lake was renamed Hoan Kiem (Returned Sword Lake) from that day. The current Ngoc Son Temple is the result of a comprehensive redesign in 1864 by Confucian scholar Nguyen Van Sieu — he added the curved vermilion The Huc Bridge, the Writing Brush Tower inscribed 'Ta thien thanh' (Write Upon the Blue Sky), and the Ink Slab Platform gate, creating a complete literary architectural ensemble. The Hoan Kiem turtle — Rafetus swinhoei, weighing over 200 kilograms — is the world's largest freshwater softshell turtle and one of the most critically endangered species on earth; the last lake turtle died in January 2016 after more than a century of presence in Hanoi's collective consciousness.
Hoan Kiem Lake measures approximately 700 metres in length and 200 metres in width — smaller than many imagine, but its intimacy and surrounding urban density create a particular sheltered feeling in the city core. The lakeshore stages Hanoi life from before dawn to midnight: at 5:30 AM elderly residents practise tai chi beneath hundred-year-old banyan trees, afternoons bring students studying and groups photographing, weekends bring the pedestrian zone filled with music and millions of strollers. The Hoan Kiem Walking Street formalized in 2016 opens every Friday, Saturday, and Sunday evening as Hanoi's largest public event, drawing millions of visitors weekly. Turtle Tower on the lake's central island — built in the late 19th century in a hybrid Vietnamese-French style — viewed through morning mist creates an ethereal scene that is one of Vietnam's most-photographed compositions.
Inside Ngoc Son Temple on Jade Island, the preserved specimen of a 250-kilogram Rafetus swinhoei giant softshell turtle found in the lake in 1968 provides the most concrete illustration of the extraordinary scale of the legendary creature that once inhabited these waters. Outside the temple gate, the Writing Brush Tower inscribed 'Ta thien thanh' (Write Upon the Blue Sky) and the Ink Slab Platform are a stone declaration of literature's power — a symbol of reverence for learning distinctive of the city dubbed Vietnam's cultural capital. The 1.6-kilometre circuit around the lake is Hanoians' favourite walking route in all weather and all seasons — from morning exercise to evening strolls, from cool winter mist to hot summer shade.
Hoan Kiem Lake is not merely a scenic spot but Hanoi's most vibrant communal memory — where every generation has left its distinctive mark, from students studying to couples meeting on The Huc Bridge, to afternoon ice cream from Trang Tien while gazing at the lake. Hoan Kiem Lake is where Hanoians converge whenever the national football team wins — from SEA Games to AFF Cup victories — transforming the lakeshore into a sea of flags and celebration. Though more than 600 years have passed since the Divine Turtle legend first emerged, Hoan Kiem Lake remains the most sacred space in Hanoi consciousness — a place where history and present intersect in an urban environment impossible to replicate in any city on earth. This is a destination that no one arriving in Hanoi can fail to visit at least once.
Hoan Kiem Lake is like a great mirror of Heaven, reflecting all the beauty and soul of Hanoi.
Nguyễn Tuân, nhà văn Hà Nội / Nguyen Tuan, Hanoi writer
Highlights not to miss.
Perched on a tiny rocky outcrop in the middle of the lake, the three-storey Turtle Tower stands 9 metres tall and was built in the late 19th century in a hybrid Vietnamese-French style featuring arched doorways and Western-style balustrades. There is no public access, but it is clearly visible from all sides of the lake — especially beautiful at dusk when floodlights cast reflections across the water, or at dawn when Hanoi's characteristic mist creates an ethereal silhouette. This is Hanoi's most iconic image — appearing on countless paintings, postcards, and artworks for over a century.
The gracefully arching vermilion The Huc Bridge — rebuilt in 1865 by Confucian scholar Nguyen Van Sieu — leads to Jade Island and Ngoc Son Temple, which enshrines Tran Hung Dao, Van Xuong, and Lu To. Inside, the temple displays a preserved specimen of a giant Rafetus swinhoei softshell turtle weighing 250 kilograms, found in the lake in 1968 — illustrating the extraordinary scale of the legendary creature that once inhabited these waters. This temple-bridge-island ensemble designed by Nguyen Van Sieu in 1864 is the most complete and beautiful example of 19th-century Vietnamese literary landscape architecture.
From Friday evening through Sunday, the streets around the lake become a vibrant pedestrian zone — officially formalized in 2016 and quickly becoming Hanoi's largest public event, drawing millions of visitors weekly. This is where Hanoians converge whenever the national football team wins, transforming the lakeshore into a sea of flags and people in a collective joy impossible to find elsewhere. Street music performances, traditional vendors, and thousands of residents from across the city make this Hanoi's most vivid living cultural experience.
Standing just before the approach to The Huc Bridge, the soaring Writing Brush Tower built by scholar Nguyen Van Sieu in 1864 bears the inscription 'Ta thien thanh' (Write Upon the Blue Sky) at its peak — a declaration of literature's power transcending political authority. The Ink Slab Platform in the form of an ink stone placed at the tower's base completes the classic scholar's set of brush, ink, lamp, and book. This pair of structures is a distinctive Hanoi symbol of reverence for learning — a city known as Vietnam's cultural and educational capital.
Visit the lake around 6:00 AM to see Hanoians practising tai chi, walking, and exercising — a living cultural experience just as rich as anything inside the temple.
How to visit & get there.
Getting There & Around the Lake
Hoan Kiem Lake is at the very centre of Hanoi, walkable from the Old Quarter (5 minutes) and most central destinations. A full circuit of the lake takes 20–25 minutes and is completely free. Buy Ngoc Son Temple tickets at the gate (VND 30,000). Early morning 5:30–7:00 is the best time to witness locals practising tai chi and folk dancing beneath 100-year-old banyan trees.
Combining Nearby Attractions
Combine Hoan Kiem with the Hanoi Old Quarter (5 minutes' walk north), Dong Xuan Market (15 minutes' walk), or the Hanoi Opera House (10 minutes' walk southeast). Best angle for photographing Turtle Tower is from the southwest bank in early morning when golden light arrives from the east. On weekends, don't miss the pedestrian zone opening from 19:00 Friday.