At 3,020 meters above sea level, Mount Titlis is one of Switzerland's best-known destinations. The tourist infrastructure on the summit has evolved over the decades and has reached the end of its life cycle. The TITLIS project will see the mountain station renewed, the existing beam antenna tower transformed, and the underground connections between the various facilities upgraded and extended. The project aims to reuse existing structures wherever this is technically and economically feasible.

The project is being implemented in multiple phases through to 2029. The new TITLIS Connect cable car entered service in 2025 for construction logistics and is scheduled to open temporarily to visitors for the first time in Summer 2026. The tower opened in June 2026 while construction of the mountain station continues, with completion in 2029.

A central element of the project is the ecological renewal of the mountain station. The existing facility consumed large amounts of fossil energy and did not meet future operational or environmental requirements. The new building will operate entirely without fossil fuels, significantly reducing CO₂ emissions compared to the current situation. Large glass facades will contribute to energy generation as part of a comprehensive energy concept. The existing concrete core and foundations of the mountain station will be retained to form the basis of the new structure. Around the existing building, a spatial steel-and-glass structure is being developed to meet the demanding conditions of the exposed summit location. The structure is designed to respond to high snow and wind loads, limited transport capacities and complex construction processes in a high-alpine environment. Inclined hinged columns in the interior act as compression members to transfer the loads from the floor beams through the foundation slab and into the sound bedrock below. Components are designed and prefabricated so that they can be transported to the summit using the available transport infrastructure.

The antenna tower, built in 1983, has been preserved and transformed into a publicly accessible structure. Rather than dismantling the existing steel construction, its load-bearing capacity was utilized and increased through targeted interventions. To accommodate public use, two storey-high steel truss volumes were inserted into the upper part of the tower. These two cross arms accommodate a watch boutique and a restaurant and cantilever approximately 12 meters on each side. Four new external steel towers were added. They carry the additional loads generated by the new program and also serve as access structures containing stairs and lifts. The industrial character of the original structure remains visible and becomes a defining architectural feature. As a result, a piece of technical infrastructure has been transformed into a new landmark on the summit. The tower's base is deeply founded in the rock and connected directly to the mountain station via an underground tunnel, providing a sheltered, weather-protected connection. This tunnel was also refurbished and upgraded as part of the project.

Implementing the project places exceptional demands on planning, logistics and construction. All building components are transported by cable car or helicopter. The structural design is therefore shaped as much by weight, dimensions and assembly sequences as by the short weather windows and the challenges of working at an altitude of more than 3,000 meters. Renewing the mountain station and tower will create durable infrastructure, securing the site for future generations.