If you want to stay in the Cau Giay district, the 10-room Mai Villa Ngan Son Hn - By Bay Luxury is a good choice located, approximately 10 minutes by car from Lotte Observation Deck. Wi-Fi is provided for both business and leisure activities.
Popular places in the area include Flag Tower of Hanoi which about a 10-minute ride away.
Net Hue Restaurant serves Vietnamese cuisine in close proximity to Mai Villa Ngan Son Hn - By Bay Luxury. Nha 24T2 KDT Trung Hoa Nhan Chinh - Hoang Dao Thuy bus station is approximately a 5-minute walk away.