Hanoi Waterpark/Ho Tay Lake Waterpark sits along the shore of Ho Tay (West Lake). It has a variety of attractions, including slides, a lazy river, a kids' pool, wave pool and some water games. It's about a 20 minute taxi ride from the old quarter, costing between 60 and 70 thousand. Entry is 50,000 until 5 pm when the price drops. Lockers cost an additional fee. Open from 8:00 am to 8:00 pm. Snack foods available.
The waterpark is popular with locals, but may not meet the standards international travelers expect in terms of hygiene or safety. Caution is advised regarding the bathrooms, walking surfaces, and uneven pavement.
If you're not into swimming, you can still enjoy the lovely views of the city and surrounding lake.
