Tag Archives: observation tower

This Unusual Observation Tower Works Just Like A Gigantic Sundial

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Designed by OPEN Architecture, the Sun Tower reaches a height of 50m and is located in Yantai, Eastern China. It forms an interesting and remarkable structure on the shoreline. It stands tall as a curving observation tower and functions much like a humongous sundial, marking the changes of the seasons.

The tower’s intriguing design draws inspiration from the area’s ancient history of Sun worshipping, and the watchtowers of ages galore that were utilized to warn the Chinese Emperors of possible seaborne attacks. The structure was built in collaboration with Arup, and its unique curving form is built from two layers of slanted concrete shells that allow the sound of the waves to echo.

Designer: OPEN Architecture 

“Informed by meticulous studies of the Sun, the northern edge of the building is parallel to the noon sunlight of the equinoxes, while the entrance tunnel aligns with the sunset during the Winter Solstice,” said OPEN Architecture. “Sitting at the center of the Sun Tower is a semi-outdoor theater, which has been orientated with its central axis pointing towards the sunrise over Zhifu Island on Summer Solstice.

The concave inner shell of the tower is perched towards the ocean. It absorbs the soothing sounds of the ocean, amplifying back through the entire structure, and even down to the amphitheater at the base. The center of the Plaza features a series of elliptical rings that look like planetary orbits. “A water channel is carved into the stone pavement. The intersections between the rings and the water channel mark the building shadow at specific hours during the equinoxes, and one outer ring features a series of fountains that celebrate the 24 solar terms of the traditional Chinese calendar,” continued OPEN Architecture.

The top of the tower includes a library and a viewing point. It also contains a “Phenomena Space” – a semi-outdoor observation deck. This deck is equipped with an oculus opening that lets the rainwater enter. The rainwater is collected in a little pool installation. The tower also houses exhibition spaces including digital screens and projections that have been built around winding pedestrian ramps. These ramps rise throughout the structure. A theater is placed on the ground floor, and it includes stunning views of the sea.

Passive strategies were adopted to better manage the Sun Tower’s interior temperature. Cross-ventilation is encouraged by installing operable openings on both shells, and hot air is removed from the building via the chimney effect. The Sun Tower is truly a unique and one-of-kind observation tower, and is another addition to Open Architecture’s collection of unusual and awe-spiring buildings.

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An Hourglass Shaped Observation Tower In Sweden Satisfies The Birdwatcher In You

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White Arkitekter, the renowned Swedish architecture studio, has recently unveiled its latest creation, the Observation Tower Kärven, in the scenic Getterön nature reserve on Sweden’s west coast. This 12-metre-tall structure, which emerged as the winning entry in an architectural competition organized by the Varberg Municipality, stands as an iconic testament to innovative design and sustainability.

Designer: White Arkitekter

The Kärven tower, which rises like an intricate lattice from the landscape, was described by White Arkitekter as having a “visually striking simplicity, reminiscent of a bundle of twisted straws.” The tower’s construction, composed of 140 timber beams and metal rings, creates a dynamic hyperboloid shape, a complex structure that fuses nature-inspired elegance with structural ingenuity.

This lattice of timber beams, skillfully arranged in a three-dimensional puzzle, gives the tower its distinctive hourglass silhouette. From a distance, the structure appears curved, but closer inspection reveals that the form is actually composed of straight beams, cleverly assembled to create the illusion of curvature.

The Kärven project required seamless collaboration between architects and structural engineers. Lead architect Lukas Nordström emphasized that “the concept required an understanding from both architect and structural engineer of each other’s disciplines.” This interplay of architecture and construction is evident throughout the tower, where the boundaries between design and engineering blur, reflecting the harmony achieved between aesthetics and functionality.

Nestled within the Getterön nature reserve, known for its rich birdlife and picturesque wetlands, the Kärven Observation Tower offers visitors uninterrupted views of the surrounding landscape. Rising from a metal-framed opening at ground level, visitors enter a sheltered space before ascending the tower’s metal spiral staircase. This staircase spirals upward to the open-air observation deck, where visitors are treated to panoramic views of the reserve and beyond.

The deck itself is an architectural marvel, framed by the rising timber beams that also serve as a balustrade, wrapping visitors in the same web-like structure that defines the tower. A geometric bench surrounds the staircase, inviting visitors to pause and reflect while they take in the stunning vistas.

One of the most remarkable aspects of the Kärven tower’s construction was its efficiency. Each of the 140 timber beams was installed on-site in just two minutes, with the entire assembly of beams taking a little over a week. This hybrid structure of timber and metal, combined with the use of parametric modeling and calculation software, allowed for precise planning and execution.

The design process made use of Grasshopper, a parametric design software, which enabled the team to map out the mathematical relationships needed for the intricate structure. This technology was crucial in realizing the tower’s complex geometry while also allowing for sustainable and local construction practices. The assembly, carried out by local contractors using standard timber dimensions, required no special tools, underscoring the tower’s emphasis on simplicity and sustainability.

The Kärven Tower was designed to fulfill the Varberg Municipality’s vision of a landmark that would attract visitors and enhance the area’s natural beauty. White Arkitekter has succeeded in creating a structure that not only serves as a viewing platform but also as a symbol of architectural and environmental harmony. With its three-dimensional woven structure, the Kärven tower not only engages the eye but also enriches the experience of the landscape it inhabits.

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