2 Days in Interlaken: A Practical Two-Day Plan

The Harderbahn climbs about 730 meters in roughly ten minutes, and the higher you go the better the view over the town, the Aare and both lakes. Ride up rather than walk up if the afternoon is short, and save your legs for day two.

Clear sky is the whole point of Harder Kulm, because the turquoise water and the Jungfrau massif are what you came to see. If cloud is sitting on the ridge, swap the afternoon for the town walk and hold the funicular for the next clear window instead of paying for a white-out.

Buy your Harderbahn ticket at the valley station on the day, when you can see what the summit is doing, rather than locking it into a fixed schedule. Fares change by season, so confirm the current return price at the counter before you board.

Close the day with a flat walk along the Aare between the lakes, where the water color and the low light do most of the work. It costs nothing, needs no transport and keeps you close to dinner on Höheweg.

This is also the moment to check tomorrow's forecast at the valley level and above it, since the day-two choice depends entirely on whether the high stations are clear.

Jungfraujoch sits at 3,463 meters, reached from Interlaken by train to Grindelwald and then the Eiger Express gondola up to the railway. At the top you get panoramic restaurants, exhibitions, a post office and, above all, the glacier views across the Jungfrau-Aletsch area.

A short elevator ride reaches the Sphinx Observatory, Switzerland's second-highest observatory and home to a Global Atmosphere Watch research station, and walking trails along the crevassed glacier lead to the Mönchsjoch Hut. This is the option to pick if you want altitude, snow and the sense of standing inside the Alps rather than looking at them.

It is also the most expensive and most weather-dependent of the day-two choices, and a cloudy summit delivers none of the panorama. Check the summit webcams before you commit, and note that this option alone can consume the entire day with transport.

Tickets for the full journey are sold as a through fare, and the price depends on the route and any pass you hold, so look up the current fare on the day you travel rather than budgeting from an old figure.

The Lauterbrunnen valley packs Staubbach Falls, which drops roughly 300 meters into the Lütschine, together with dozens of other falls into one narrow trough of cliffs and green meadows. It is the better day when you want valley floor, short walks and constant scenery rather than a single high station.

Trümmelbach Falls is the centerpiece: glacier melt from the Eiger, Mönch and Jungfrau thunders through a subterranean gorge that you enter by tunnel, stairs and lighting built in 1913, with ten sections along the route. The highest drop is about 290 meters and the water volume in summer is enormous.

Arrive early, because tour groups fill the underground passages later in the morning and the lighting and noise change the experience completely. Walk the route rather than taking the lift both ways if your knees allow it, and travel up to the upper falls on foot for the quieter sections.

Entrance to Trümmelbach Falls is ticketed separately from your train, and the current adult and child prices are posted at the counter and on the operator's site, so check before you set out.

A steamboat on Lake Thun gives you an unobstructed line on the Jungfrau and Eiger from the water, with old castle stops along the shore. Lake Brienz serves the Giessbach hotel above its waterfall if you prefer a shorter hop and a shoreline walk.

Mürren sits at 1,160 meters, bans cars and holds roughly 500 residents, and the train from Interlaken takes about an hour. Choose it if you want a village to wander rather than a summit, but expect company, since it draws crowds all season.

A lake pass covers the boats on either lake and is the cheapest way to spend a half day on the water. Pick one lake rather than trying to do both, because the crossings eat the afternoon.

If you would rather compare how much time each of these deserves, the question of how many days in interlaken you need sorts the shortlist by ambition and budget.