Heritage Village
Heritage Village is open from 9am to 5pm from Saturday to Thursday and 3:30pm to 9pm on Friday. It's a nice place to spend an hour or two. There are tents and traditional huts as well as a small museum with a photo gallery of time before oil in Abu Dhabi. There's also a beautiful stretch of beach of people jet skiing plus a view of Emirate Palace in a distance and the city skyline. It's about a 20-minute walk to Marina Mall. Alternatively, you can take an 1-dirham bus ride there. The tallest flagpole is right by it. I think it's worth dropping by, especially since it's free!