Past tense of go is ''went'', I went.... spelunking on my holiday.

go 过去式是“went” ，去了… … 期在洞穴探险。

I am currently spelunking in the Radiolab archives.

目前正在 Radiolab 档馆中探索。

That agent rossi wrote up that I'm still spelunking for.

犯罪录 仍在深入研究。

I would prefer a headlamp, such as one would use for spelunking.

最好是头戴式照明灯 洞穴探险用那种。