I've been wanting to explore Belgrade's underground tunnels since last year. Finally made it happen.

Right beneath the city center, different structures appeared at different times: a Roman well, a gunpowder magazine, and a military bunker.

The so-called Roman well isn't actually Roman or a well. The Austrians dug it about 300 years ago, but it turned out there was no water. They initially wanted to connect it to the Danube, but ended up just filling it with water instead. Since then, the well has accumulated plenty of legends. There are rumors they even threw prisoners down there. But there are confirmed cases too: in 1954, one local guy actually threw his wife down there.

The gunpowder magazine was turned into a lapidarium—basically an exhibition of stone tombstones. Back in the early 2000s, they'd hold various rock concerts here. The acoustics are fantastic. Plus you've got this whole vibe with the tombstones, and apparently visitors would leave beer cans on them. It was basically perfect. But one evening a column collapsed in the hall, and they haven't held any events there since. Though there's still a similar venue operating in Novi Sad if you're interested.