# Son Tay Ancient Citadel, Vietnam: what it is and when to go > Son Tay Ancient Citadel is a visitor attraction (Thành cổ Sơn Tây) in Vietnam (Sơn Tây). Interests: History. The best time to visit is February to April and October to November. In June there are 13 h 17 of daylight, and in December, 10 h 43. It has articles in 3 Wikipedias, so it is not one of the busiest places in Vietnam: one to enjoy at a calmer pace. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip. - Address: https://kokai.app/en/paises/asia/vietnam/son-tay-ancient-citadel/ - Reviewed on: 2026-10-08 - Language: en ## In a nutshell - **What it is:** Activity · History - **Local name:** Thành cổ Sơn Tây - **Where:** Vietnam - **Best time:** February to April and October to November. - **Nearest airport:** HAN Hanoi (Soc Son), 33 km as the crow flies - **Coordinates:** 21.13913, 105.50449 ## What it is and where Son Tay Ancient Citadel is a visitor attraction (Thành cổ Sơn Tây) in Vietnam (Sơn Tây). It has articles in 3 Wikipedias, so it is not one of the busiest places in Vietnam: one to enjoy at a calmer pace. It is in [Sơn Tây](https://kokai.app/en/paises/asia/vietnam/son-tay/), where this site lists 6 more places to see, 117 m from the centre. Its coordinates are 21.13913, 105.50449; the nearest main airport is Noi Bai International Airport (HAN, Hanoi (Soc Son)), 33 km as the crow flies. How to get around Vietnam (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/asia/vietnam/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=21.139133%2C105.504492) - [Directions](https://www.google.com/maps/dir/?api=1&destination=21.139133%2C105.504492) It is one of the [History](https://kokai.app/en/paises/asia/vietnam/historia/) places in Vietnam. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap. ## When to go The best time to visit Son Tay Ancient Citadel is **February to April and October to November**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 10 h 51 | | February | Best time | 11 h 18 | | March | Best time | 11 h 51 | | April | Best time | 12 h 29 | | May | Possible | 13 h | | June | Possible | 13 h 17 | | July | Possible | 13 h 10 | | August | Possible | 12 h 44 | | September | Possible | 12 h 07 | | October | Best time | 11 h 30 | | November | Best time | 10 h 58 | | December | Possible | 10 h 43 | In June there are 13 h 17 of daylight, and in December, 10 h 43. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather. When to go to Vietnam in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/asia/vietnam/#cuando-ir). ## Before you go to Vietnam To enter Vietnam there are 9 things to sort out before you leave, starting with “Passport valid for six months”: they are all, with their deadlines, in [the Vietnam checklist](https://kokai.app/en/paises/asia/vietnam/#antes-de-salir). Currency: Vietnamese dong (VND); plugs: Type A, C and F · 220 V · 50 Hz (the Spanish two-pin plug usually works); emergencies: 113 police · 115 ambulance · 114 fire brigade. In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it. ## What is nearby - [Đình Mông Phụ](https://kokai.app/en/paises/asia/vietnam/dinh-mong-phu/): Temples · 4.1 km - [Village for Ethnic Culture and Tourism](https://kokai.app/en/paises/asia/vietnam/village-for-ethnic-culture-and-tourism/): With kids · 12 km - [Chùa Tây Phương](https://kokai.app/en/paises/asia/vietnam/chua-tay-phuong/): Pagoda in Son Tay, Hanoi · 15 km - [Ba Vì National Park](https://kokai.app/en/paises/asia/vietnam/ba-vi-national-park/): Vietnam national park located in the Ba Vì mountain range · 17 km - [Hanoi Sea Park](https://kokai.app/en/paises/asia/vietnam/hanoi-sea-park/): With kids · 19 km Distances are as the crow flies. Everything else is in [the Vietnam guide](https://kokai.app/en/paises/asia/vietnam/). ## More in Vietnam: History - [Phong Nha–Kẻ Bàng National Park](https://kokai.app/en/paises/asia/vietnam/parque-nacional-phong-nha-ke-bang/): national park in Vietnam - [Citadel of the Hồ Dynasty](https://kokai.app/en/paises/asia/vietnam/ciudadela-de-la-dinastia-ho/): UNESCO World Heritage site in Thanh Hóa, Vietnam - [Mỹ Sơn archaeological site](https://kokai.app/en/paises/asia/vietnam/santuario-de-my-son/): Vietnamese world heritage site with over 100 Cham Hindu monument ruins - [Củ Chi tunnels](https://kokai.app/en/paises/asia/vietnam/tuneles-de-cu-chi/): network of underground tunnels used by Viet Cong soldiers during combat - [Imperial Citadel of Thăng Long](https://kokai.app/en/paises/asia/vietnam/ciudad-imperiale-de-thang-long/): old imperial citadel in Hanoi, Vietnam - [Ho Chi Minh Mausoleum](https://kokai.app/en/paises/asia/vietnam/ho-chi-minh-mausoleum/): national mausoleum in Hanoi, Vietnam Every Vietnam place under History, each with its season, is on [its page](https://kokai.app/en/paises/asia/vietnam/historia/). ## Frequently asked questions ### What is Son Tay Ancient Citadel? It is a visitor attraction (Thành cổ Sơn Tây in the local language) in Vietnam. It has articles in 3 Wikipedias, so it is not one of the busiest places in Vietnam: one to enjoy at a calmer pace. ### When is the best time to visit Son Tay Ancient Citadel? February to April and October to November. In June there are 13 h 17 of daylight, and in December, 10 h 43. ### How do you get to Son Tay Ancient Citadel? The nearest main airport is Noi Bai International Airport (HAN), 33 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=21.139133%2C105.504492) opens the route on the map, and how to get around Vietnam is explained in [its country guide](https://kokai.app/en/paises/asia/vietnam/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the Vietnam map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby. ### What else is around here? Nearby you have [Đình Mông Phụ](https://kokai.app/en/paises/asia/vietnam/dinh-mong-phu/), [Village for Ethnic Culture and Tourism](https://kokai.app/en/paises/asia/vietnam/village-for-ethnic-culture-and-tourism/), [Chùa Tây Phương](https://kokai.app/en/paises/asia/vietnam/chua-tay-phuong/). The rest is in [the Vietnam guide](https://kokai.app/en/paises/asia/vietnam/). Data from [OpenStreetMap](https://www.openstreetmap.org/way/921987266), licensed under the ODbL. More about Son Tay Ancient Citadel on [Wikipedia](https://vi.wikipedia.org/wiki/Th%C3%A0nh_c%E1%BB%95_S%C6%A1n_T%C3%A2y). Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).