Where: We can just make out the name of the building in the background:
No sign of this old building today, of course, but the name (highlighted in green) lives on around where it used to stand:
The Ming Yuen Gardens  were a recreation ground out at North Point. Newspaper reports describe a variety of entertainments held there, such as acrobats, boxing, and a circus.
It's hard to imagine now, but this area used to be a popular place to escape the city. You could travel here by tram, and enjoy a break away from the built-up areas. Dragon boat races were held here, and it was also a good place to come for a swim.
When: I'm not sure when Ming Yuen Gardens opened, but the first mention I found in a newspaper is from 1919. They didn't last long as by 1924 the papers reported that the gardens had closed down.
Later reports suggested the gardens re-opened again after several years, but I guess this photo was taken around 1920. Corrections welcome!
Who: There's a big group of spectators in the background, but the people we can see clearly are the men paddling the boat:
Judging by the sedate little splashes, they're just moving into position - once the race begins the water will really start flying!
The drummer has someone in his sights. Is he telling someone to get out of the way, or giving the opposition a talking down?
I noticed several of the men's hats have characters on. Is it their team name, or just the brand of hat?
What: There's some sort of obelisk on the hillside above Ming Yuen:
Was it just a decorative item within the gardens, or does it have any other meaning?
We can also see excavation under way on the right of the photo:
This strip of land will grow much wider over the years, through a combination of excavation moving the cliff inland, and reclamation pushing the shoreline out.
And finally, the star of the show:
Good luck if you're taking part in the Dragon Boat races on Monday. Be sure to take plenty of drinking water, as this hot, sunny weather is forecast to continue.
Elsewhere on Gwulo.com this week:
- Ming Yuen Gardens: http://gwulo.com/node/20041