A Wat is a sacred Buddhist area with monks quarters. They’re everywhere in Bangkok, almost as ubiquitous as the 7/11.
If Eric and I started a tour company in Bangkok, we would call it “Wat Watchers”. It would involve an intense regime of Wat visiting with as many puns on the word Wat as possible. It’s tiring because there’s so many in the city, but visiting them all would be a wat of fun.