But the highlight in Grindelwald is probably a ride on the cogwheel train to the Jungfraujoch. Up there on the glacier there is snow in both summer and winter. So think of warm clothing and plan a whole day for the experience. Buy the tickets either at the stations of the cog railway to Jungfraujoch in Interlaken, Grindelwald, Grindelwald Grund or Lauterbrunnen or online.
The mountain station is the "Kleine Scheidegg", where the summit lift starts and you have to change trains. There can be a lot going on here. The journey from Grindelwald to the Jungfraujoch takes around two hours one-way, including waiting time when changing trains.