This was a game released in the early 1990s (it was called Pang for the Spectrum, which was what I had back then). It featured bubbles floating around, that caused instant death if touched. Naturally, in such a scenario, you would fire harpoons at the bubbles, causing them to divide in two. Arguably, two smaller balloons is as even more dangerous scenario, but shoot them a few more times and they would disappear. The world's landmark would be safe!
I'd love to pretend that at a young age - I would have been about 11 or 12 - Buster Bros aka Pang made a big impression on me, stirring my desire to visit all the exotic places on the list. But I don't think I ever owned it. I recall its existence, and possibly even played it, but other games made a far bigger impression on me, such as Football Manager 2, the wizard arena combat of Chaos, and the space trading game, Elite 2. I do not appear to have become either a football manager, a wizard, or an interstellar wanderer, making me wonder if my youth was slightly squandered.
Anyway, I took a look online and have found screenshots of many of the landmarks featured in Buster Bros. Most of them happen to be on my list, indicating that Japanese software developers of the late 80s/early 90s were right on the nose with their research. Here, across a selection of different computers, are the ones we agree on - the Hagia Sophia, Borobudur, the Temple of the Emerald Buddha, Himeji Castle, Houses of Parliament and Big Ben, Neuschwanstein Castle, the Acropolis, Sacre-Coeur, Sagrada Familia, Tower Bridge, Easter Island, and the Pyramids.
There are a handful others too, not quite on my list. There's the Arc de Triomphe and another I'd totally forgotten about until now, Boudhanath in Kathmandu, which I'll pop onto my Longlist. Thanks Buster Bros. The remaining three are natural, but I'll put them up here anyway: Mount Fuji, Mount Keirin, and Ayers Rock.
There are others too, but I'm not going to spend the rest of my day hunting Google Images for screenshots of a 25-year-old computer game. I would like to believe I have better things to do.
Happy Christmas by the way.