Interlaken is a beautiful destination with plenty of activities to keep you busy for 7 days. Here's an ideal itinerary for your trip:

Day 1: Arrival and Orientation

• Arrive in Interlaken and check into your hotel.
• Take a stroll around the town center and get familiar with the area.
• Visit the Tourist Information Center to pick up maps and brochures.

Day 2: Jungfraujoch and Grindelwald

• Take the train to Jungfraujoch, the highest railway station in Europe.
• Enjoy the stunning views of the Swiss Alps from the observation deck.
• Take a short hike on the Aletsch Glacier.
• Visit the charming village of Grindelwald and explore its shops and restaurants.

Day 3: Lake Brienz and Giessbach Falls

• Take a boat tour on Lake Brienz and enjoy the scenic views of the surrounding mountains.
• Visit the Giessbach Falls, a series of waterfalls cascading down the mountain.
• Take a hike through the forest to reach the top of the falls.

Day 4: Lauterbrunnen Valley and Trümmelbach Falls

• Take a train to Lauterbrunnen Valley, known for its picturesque scenery.
• Visit the Trümmelbach Falls, a series of ten glacier-fed waterfalls inside a mountain.
• Take a cable car to Mürren and enjoy the panoramic views of the valley.

Day 5: Harder Kulm and Lake Thun

• Take the funicular to Harder Kulm, a mountain peak overlooking Interlaken.
• Enjoy the panoramic views of the town and the surrounding mountains.
• Take a boat tour on Lake Thun and visit the charming town of Thun.

Day 6: Adventure Sports

• Try adventure sports such as paragliding, bungee jumping, or canyoning.
• Take a scenic hike in the mountains or go mountain biking.
• Relax at one of the local spas and enjoy a massage or sauna.

Day 7: Interlaken Town and Departure

• Spend the day exploring the town of Interlaken and its shops and restaurants.
• Visit the Höhematte Park and enjoy the views of the surrounding mountains.
• Depart from Interlaken and head to your next destination.

I hope this itinerary helps you plan your trip to Interlaken!