Wandering around different places is absolutely my favourite thing to do. While I usually take a pretty well-researched map with me of places I want to go, once I cover that off, I'm free to just go exploring. Its a great way to see the city when you have time to do it properly, as you see things usually off the beaten track. 

While the park below with the crystal palace was on my map, the rest of it was blissfully unresearched and new!