INTERLAKEN CITY TOUR FIELD GUIDE
Circling Lake Thoune: caves, castles and the Sigriswil suspension bridge
A guided day out from Interlaken that threads lakeshore vistas, the Beatus cave system, lakeside castles and the dramatic Sigriswil suspension bridge—useful for planning stops, optional visits and what to expect on a full-day circuit.
Circling Lake Thoune: caves, castles and the Sigriswil suspension bridge.
Adventure brief
Circling Lake Thoune: caves, castles and the Sigriswil suspension bridge
This is a full-day clockwise sweep of Lake Thoune, beginning in Interlaken and moving past harbors, castle parks and rocky gorges to the Beatus caves and the Sigriswil suspension bridge. The route mixes short walks, a brief ascent to the cave entrance, lakeshore drives and optional castle visits, all led by a personal guide so you can tailor stops and lunch along the way.
Nestled in the heart of the Swiss Alps, Lake Thoune offers a captivating blend of natural beauty and outdoor adventures, making it a prime destination for travelers seeking both relaxation and thrill. The 8.5-hour tour begins with a scenic cruise across the shimmering waters of Lake Thoune, famed for its crystal-clear surface and stunning mountain backdrop. As you glide through, keep an eye out for local birdlife and the rugged peaks that dominate the landscape. The journey then takes you inland to explore historic castles perched atop scenic hills, where stories of Swiss heritage come alive. A highlight is the Beatus Caves, a sprawling network of grottoes decorated with striking stalactites and stalagmites, revealing evidence of geological history dating back thousands of years. The tour's pinnacle is crossing the Sigriswil suspension bridge, an engineering marvel suspended 180 meters above the Reppisch valley, offering sweeping views that are nothing short of breathtaking. To cap off the day, travelers can indulge in gourmet dining at Oberhofen, overlooking the lake’s tranquil waters. The personal guide ensures you savor each moment, customizing the experience to your interests. The area around Lake Thoune and Interlaken makes for a standout Swiss adventure, combining outdoor exploration with cultural immersion. It’s a perfect getaway for travelers craving authentic nature encounters with a touch of history and engineering marvels, all set against Switzerland’s iconic alpine scenery.
Route Schematic
Route schematic — main stops
A sequential run-through of the tour’s principal stops and what you do or see at each.
Interlaken harbor
Morning departure point with views over Lake Thoune and an optional short hike along the lakeshore nature reserve.
Beatus caves (or Blue Lake alternative)
Drive to the caves; a 10-minute ascent brings you to a viewpoint over the lake before entering Switzerland’s notable cave system; in summer the Blue Lake is offered as an alternative.
Sigriswil suspension bridge
Cross the Nepali-style bridge spanning a gorge and take in broad views of the lake, alpine ridges and shoreline villages.
Oberhofen castle park and lunch
Stop at Oberhofen for castle park views and choose from nearby haute-cuisine restaurants for lunch with lakeside panoramas.
Thoune city and optional castle visit
Explore Thoune’s old town, lakeside parks and the castle that overlooks the city; castle visits are optional.
Bay of Spiez (return)
A final picturesque stop at Spiez castle park on the way back to Interlaken.
Expect short walks and a 10-minute ascent to reach the Beatus cave entrance and optional 40-minute lakeshore hikes; several stops (Beatus caves, Sigriswil bridge) carry separate admission fees and visits are optional.
Highlights
Outing Highlights
Lake Thoune and its harbors
The tour begins at Interlaken’s harbor and follows the shoreline of Lake Thoune, with repeated vantage points for the lake, alpine backdrops and castle-lined shore.
Beatus caves—Switzerland’s great cave complex
A short ascent brings you to the Beatus cave entrance and its viewpoints before descending into the cave system; the Beatus Caves are a key stop on the circuit.
Sigriswil suspension bridge and its gorge views
Cross the Nepali-style suspension bridge at Sigriswil—an iconic vantage over a steep gorge with broad views of the lake, the villages on its shore and the surrounding Alps.
What the day feels like
How the day unfolds
You depart Interlaken in the morning for a roughly full-day tour circling Lake Thoune: first the harbor at Interlaken with optional short hikes along the lakeshore, then a drive to the high viewpoint above the Beatus caves and a descent into the cave system (or the alternative Blue Lake in summer). Next comes Sigriswil’s suspension bridge, followed by lakeside Oberhofen—where haute-cuisine lunch options await—then on to Thoune’s old town and castle and a final stop at the Bay of Spiez before returning to Interlaken.
Suitability
Who it's for
Who this tour suits—and who should think twice.
Practical planner
Details to review before reserving
The outing is a full-day tour beginning in the morning and runs approximately 7.5–8 hours overall.
If you plan to take the nature-reserve walk or enter the cave, bring comfortable walking shoes—the itinerary includes a possible 40-minute lakeshore hike and a roughly 10-minute ascent to the cave entry.
Some activities are not included in the tour price: Beatus Caves (CHF 18.00 per person) and the suspension bridge (CHF 8.00 per person); castle visits are optional and may carry separate admission.
Oberhofen and other lakeside locations provide high-end lunch options with lake views; you can plan a longer midday stop for dining.
Review cancellation policies before reserving.
Frequently asked questions
Planning Your Outing
How long is the tour?
The day runs approximately 7.5–8 hours.
Where does the tour start?
The tour departs from Interlaken in the morning, beginning at the Interlaken harbor area.
Are cave and bridge tickets included?
No; Beatus Caves (CHF 18.00 per person) and the Sigriswil suspension bridge (CHF 8.00 per person) are not included in the advertised rate.
Can I substitute the Beatus caves visit?
Yes—during summer the Blue Lake is offered as an alternative to the Beatus caves.
Is lunch provided?
Lunch is not provided as part of the base rate; the route stops at Oberhofen and other lakeside restaurants where haute-cuisine options are available for a relaxed lunch stop.
Are castle visits included?
Castle visits in Thoune, Oberhofen or Spiez are optional and may involve additional admission charges.
How this guide was prepared
This field guide is synthesized using verified supplier specifications, route descriptions, and destination data. Some booking links may generate affiliate revenue for ADV Guides.
- Verified: 2026-09-12T12:11:48.107Z
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Availability, pricing, schedules and operating details can change.
Trip details and contextual sources were reviewed by ADV Guides Editorial.