Kensington Gardens are open from 6 am to dusk all year round.
Guided tours:
Mar-Dec: first Sunday of the month at 2 pm and 3 pm
Guided tours:
Adults: £9
Concessions: £8
The tour lasts 40 - 45 minutes.
Wikipedia https://zh.wikipedia.org/wiki/阿尔伯特纪念亭
地址 Kensington Gardens, London W2 2UH, UK
坐标 51°30'8.582" N -0°10'39.654" E