The design of alternative buildings pursues innovation and uniqueness and breaks through traditional architectural forms and norms. These buildings demonstrate the architect's creativity and aesthetic pursuit through the introduction of new materials, shapes, and structures, as well as outstanding artistic expression.

Many alternative buildings have become landmarks and symbols of the city, representing the city's modernization, prosperity, and innovation. These buildings can attract tourists, enhance the city's popularity, and become a symbol of urban culture and development.

The following is a description of some famous buildings:

1. Sydney Opera House: Located in Sydney, Australia, the Sydney Opera House is one of the most famous buildings in the world. Its design was inspired by sailing ships, and architect Uto Berzmann translated this distinctive shape into a shell-shaped roof covered in white tiles.

This design was very avant-garde and innovative at the time and became a symbol of modern architecture. The opera house includes multiple concert halls, theaters, and art spaces, and is a world-class performing arts center.

2. Guggenheim Museum Bilbao: The Guggenheim Museum is located in Bilbao, Spain, and was designed by architect Frank Gehry. Known for its streamlined, curvilinear exterior, the museum's exterior walls are made of steel panels and glass, giving it a unique metallic texture.

Innovative and bold, this design has had a profound impact on contemporary architecture. Modern and contemporary works of art are displayed in the museum, which attracts art lovers from all over the world.

3. Burj Khalifa: The Burj Khalifa is located in Dubai, United Arab Emirates, and is currently the tallest building in the world. Its design was inspired by the geometric patterns of Islamic art, and its exterior features a glass curtain wall and steel structure, forming the unique shape of Burj Khalifa.

The tower houses offices, a hotel, apartments, and an observation deck that offers spectacular panoramic views of the city. The Burj Khalifa has become one of the landmark buildings in Dubai, symbolizing the modernization and prosperity of the city.

4. Leaning Tower of Pisa: Located in Pisa, Italy, the Leaning Tower of Pisa is a bell tower known worldwide for its pronounced inclination. The Leaning Tower was built in the 12th century on an unstable foundation that caused it to gradually tilt.

Although the leaning of the leaning tower triggered a series of restoration works, it still maintains its unique appearance and appeal, becoming one of Italy's important tourist attractions.

5. Icehotel: The Swedish Ice Hotel is located in Kiddholmen, Sweden. It is the world's first hotel built with ice and snow as materials. Each winter, the hotel is rebuilt using ice and snow from local rivers for the rooms, and lobby.

The design of the ice hotel is full of imagination and creativity, and each room is decorated with unique snow and ice sculptures, providing visitors with a unique cold experience.

6. Chihuly Garden and Glass: Seattle Sky Garden is located in Seattle, USA. It is an art gallery that displays the glass art of artist Dale Chihuly. The gardens feature multiple indoor and outdoor exhibition spaces that showcase Chihuly's elaborate glass sculptures and flowers inspired by the forms and colors found in nature. This unique art space combines glass art with the natural environment to create a stunning visual experience.

7. Maltinista, Rotterdam, the Netherlands: Maltinista is located in Rotterdam, the Netherlands. It is a building with a spiral staircase design. The building's exterior consists of a series of spiraling platforms and stairs, giving the impression of a three-dimensional labyrinth. Maltinista is part of Rotterdam's modern urban plan and represents the city's quest for innovative and experimental architecture.

8. Dongdaemun Design Plaza, South Korea: Dongdaemun Design Plaza is located in Seoul, South Korea. It is a multi-functional cultural and art center. It catches the eye with its streamlined, curved exterior and modern design. The interior of Design Plaza includes exhibition space, theater, design mall, and public plaza, providing a platform for artists and designers to create and communicate.

9. Bergen National Opera: The Bergen Opera House is located in Bergen, Norway. It is an opera house whose architectural design is inspired by the Norwegian glaciers.

Its appearance is like a huge iceberg, using glass and metal materials to create a cold and modern appearance. Featuring a theatre, rehearsal rooms, and exhibition spaces, the opera house provides a unique venue for artistic performances and cultural events.

10. The glass dome of the British Museum in London, England: The glass dome of the British Museum in London is located in the central hall of the British Museum in London, England. It adopts a glass dome design.

It combines modern architecture with historic buildings to form a unique space. The glass dome creates a bright and majestic atmosphere through the refraction and reflection of light, providing an impressive venue for the museum's exhibitions and visitors.

All in all, the design significance of alternative architecture is to promote innovation and expression in the field of architecture, shape the image of the city, display cultural and historical values, promote sustainable development, and provide unique social interactions and experiences.