ChatGPT helped with this itinenary (in 30 seconds).. It even gave me how much each travel ticket is with and without swiss pass, half pass etc. (couldn't copy them all)
Itinerary: Interlaken & Jungfrau Region (October 18-22)
Day 1: October 18 (Arrival in Interlaken)
6:00 PM: Arrive in Interlaken and check in to your accommodation.
7:00 PM: Explore Interlaken town center.
Activity: Walk along Höheweg Promenade and enjoy dinner at a local restaurant
9:00 PM: Relax and prepare for the next day's adventures.
Day 2: October 19 (Harder Kulm & Lake Brienz)
8:00 AM: Breakfast at your hotel.
9:00 AM: Take the Harderbahn funicular to Harder Kulm (10 minutes).
Enjoy: Panoramic views of Interlaken, Lake Thun, and Lake Brienz.
Relax: At the mountaintop restaurant for drinks or snacks.
11:00 AM: Descend back to Interlaken via the funicular.
12:00 PM: Lunch in Interlaken at a local restaurant (e.g., Benacus or Restaurant Taverne).
1:30 PM: Take a boat ride from Interlaken Ost on Lake Brienz (1 hour).
3:00 PM: Return to Interlaken from the boat ride.
3:30 PM: Free afternoon to explore Interlaken, visit shops, or relax.
7:30 PM: Dinner in Interlaken (e.g., Ristorante Sapori).
Day 3: October 20 (Jungfraujoch – Top of Europe & Grindelwald First)
8:00 AM: Breakfast at the hotel.
8:45 AM: Depart from Interlaken Ost for Jungfraujoch.
Take the train to Grindelwald Terminal (20 minutes).
From Grindelwald Terminal, board the Eiger Express cable car to Eigergletscher (15 minutes).
At Eigergletscher, switch to the Jungfrau Railway and travel up to Jungfraujoch (35 minutes).
At Jungfraujoch:
Sphinx Observatory: Spend about 30 to 60 minutes enjoying the panoramic views.
Ice Palace: Spend about 30 to 45 minutes exploring the ice sculptures and tunnels.
12:00 PM: Have a light lunch at one of the restaurants on Jungfraujoch.
1:00 PM: Depart from Jungfraujoch to return to Grindelwald.
Travel back to Eigergletscher via the Jungfrau Railway (35 minutes).
Take the Eiger Express down to Grindelwald Terminal (15 minutes).
2:30 PM: Arrive at Grindelwald Terminal and walk to the Firstbahn cable car station (5-10 minutes).
2:45 PM: Take the Grindelwald First cable car (25 minutes).
Enjoy: The Cliff Walk (included with your Firstbahn ticket).
Optional: Try activities like the First Flyer (zipline) or hike to Bachalpsee Lake (about 1 hour each way).
5:30 PM: Return to Grindelwald and then take the train back to Interlaken.
7:30 PM: Dinner in Interlaken (e.g., Ristorante Sapori).
Day 4: October 21 (Lauterbrunnen Valley & Schynige Platte)
8:00 AM: Breakfast at your hotel.
9:00 AM: Take a train to Lauterbrunnen from Interlaken Ost (approx. 20 minutes).
Staubbach Falls:
From Lauterbrunnen train station, it's a 10-minute walk to Staubbach Falls.
Spend about 30 minutes at the falls.
Trümmelbach Falls:
Take a 10-minute bus ride (PostBus #141) from Lauterbrunnen to Trümmelbach Falls.
Spend about 1 hour exploring the waterfalls inside the mountain.
12:30 PM: Lunch in Lauterbrunnen at Hotel Oberland or another local spot.
1:30 PM: Travel to Schynige Platte.
Travel: Return to Interlaken Ost and take the cogwheel train to Schynige Platte (approx. 50 minutes).
At Schynige Platte: Spend the afternoon enjoying the stunning views and explore the botanical garden.
5:00 PM: Return to Interlaken.
7:00 PM: Final dinner in Interlaken (e.g., Restaurant Laterne or Ristorante Sapori).
Day 5: October 22 (Departure)
8:00 AM: Early breakfast and a morning walk around Interlaken.
10:00 AM: Check out of your accommodation.
12:00 PM: Departure.