Brussels as a solo female
Although Brussels is not the most vibrant or exciting place, it was a nice relaxing place to spend a few days (I would recommend 3 maximum). The Atomium is a must, and I also enjoyed Mini Europe. Take a day trip through Viator to Brugge and Ghent, and if you have time then spend a night in Brugge. The metro is easy to figure out but walking is also a pretty easy way to get around. Good food and good bars for sure, although if you're into a stellar night scene, I wouldn't expect too much.
Insider Tip:Don't plan your trip out too much if you're there for 2-3 days. It was nice to do things spontaneously, especially in the evenings. Do the Sandeman's walking tour and their beer your (great value, great way to meet new people!).