The main structure and walls of the log house are constructed of wood, including wooden frames, beams, columns, and wall panels. Wood is generally strong, durable, and has good structural strength.

Wood has good thermal insulation properties and can provide a certain degree of thermal insulation. The log cabin stays warm in winter and cool in summer, creating a comfortable living environment.

There can be a variety of reasons why a log house was originally built. Here are some common causes:

1. Adaptation to the natural environment: Log houses are often built in the natural environment, especially around mountains, forests, and lakes. The construction materials and structure of the wooden house can better adapt to the climatic conditions and topographic characteristics of these areas.

2. Resource Availability: Wood is an abundant natural resource in some areas, making log homes an affordable and easy-to-build option. As a renewable resource, wood makes the construction of wooden houses more sustainable.

3. Traditional culture and history: The construction of many wooden house attractions is closely related to the local traditional culture and history. These wooden houses may represent the architectural style and lifestyle of a specific cultural group, retain traces of history, and become a part of cultural heritage.

4. Tourism and vacation needs: wooden houses are often used as ideal choices for tourism and vacation. They offer a way to get close to nature and appeal to those looking to escape the noise and stress of the city. Log cabin resorts and holiday villas are also tourist accommodation options that offer comfort and privacy to tourists.

5. Architectural aesthetics and style: The unique aesthetics and natural charm of wooden houses make them one of the most beloved architectural styles. The warm tones, natural textures, and cozy ambiance of wood give log homes their unique appeal.

There are many famous log cabin spots in the world, here are some of them:

1. Swiss Alps: The Swiss region located in the Alps has many traditional log cabin villages such as Zug and Grindelwald.

2. Bergen, Norway: Bergen is a port city in Norway, famous for its traditional Hanseatic League wooden houses. Built in the 18th century, these painted wooden houses are a symbol of local history and culture.

3. Aspen in the United States: Aspen is a small town in Colorado, known as the "Ski Capital of America". There are many luxurious wooden houses and mountain villas in this area, which attract many rich and famous people.

4. Gassho Village in Japan: Located in the Hida Mountains in Japan, Gassho Village is a settlement of a group of traditional farmhouses and wooden houses. Its unique architectural style and well-preserved traditional culture attract many tourists.

5. Valborg, Sweden: Valborg is a historic wooden house city in Sweden, which retains many wooden buildings from the 18th century. The city is known for its unique architecture and stunning riverside scenery.

6. Mont-Tremblant, Canada: Mont-Tremblant is a famous tourist destination in Quebec Province, famous for its traditional wooden houses and picturesque scenery.

7. Hallstatt, Austria: Hallstatt, located in the Austrian state of Salzburg, is a charming town with many traditional wooden houses and great views of the Alps. There are also some historic wooden farmhouses here that showcase the charm of Austrian country life.

8. Lappeenranta, Finland: Lappeenranta is a winter resort in northern Finland, famous for its unique glass and wooden houses. The chalets are designed to be modern and blend in with the natural surroundings, providing a unique living experience.

9. Schwarzwald, Germany: Schwarzwald is a forested region in southwestern Germany that is home to many charming log cabin resorts. The log cabins here are often in typical Black Forest style, surrounded by dense forests and beautiful mountain scenery.

10. The Basque Country of Spain: There are many old fishing villages and small towns in the Basque Country of Spain, some of which have typical Basque-style wooden houses. For example, the old town of the city of Bilbao and the small town of La Concha in San Sebastián are both famous for their traditional wooden buildings.