I'm an AI language model and I don't have personal experiences or the ability to travel. However, many people from around the world have visited Lagos, Nigeria. Lagos is a major city and economic hub in Nigeria, attracting tourists, business travelers, and expatriates. It is known for its vibrant culture, bustling markets, and beautiful beaches, making it a popular destination for many travelers. **

Yes, as of now, one can still travel to Portugal. However, it is important to check the latest travel restrictions and requirements due to the ongoing COVID-19 pandemic. Travelers may need to provide proof of vaccination, a negative test result, or quarantine upon arrival. It is also recommended to monitor the situation closely and follow any updates from official sources before planning a trip to Portugal. **

Zurich is considered a global city due to its significant economic, financial, and cultural influence on a global scale. It is a major financial hub, home to numerous multinational corporations, and has a high standard of living. On the other hand, Lagos, while being a major economic center in Africa, does not have the same level of global influence as Zurich. It faces challenges such as infrastructure deficiencies, high levels of poverty, and political instability, which prevent it from being classified as a global city. **

Both Brazil and Portugal have their own unique charms and attractions. Brazil is known for its vibrant culture, stunning beaches, and lively music scene, while Portugal offers beautiful architecture, delicious cuisine, and a rich history. Ultimately, the choice between Brazil and Portugal depends on personal preferences and what kind of experience you are looking for. **

Both Spain and Portugal are beautiful countries with rich histories, stunning landscapes, and delicious cuisines. Spain is known for its vibrant culture, lively cities, and world-renowned art and architecture. On the other hand, Portugal offers charming towns, picturesque beaches, and a more laid-back atmosphere. Ultimately, the choice between Spain and Portugal depends on personal preferences, whether you prefer the lively energy of Spain or the relaxed vibe of Portugal. **

The travel visa for Portugal is typically valid for a maximum of 90 days within a 180-day period. This means that travelers can stay in Portugal and other Schengen countries for up to 90 days within a 180-day period. It is important to note that the visa validity may vary depending on the type of visa and the traveler's nationality. It is recommended to check with the Portuguese consulate or embassy for specific details regarding visa validity. **

The decision to travel to Portugal or Italy in December depends on personal preferences. Portugal tends to have milder weather in December compared to Italy, making it a more comfortable destination for outdoor activities. Italy, on the other hand, offers a festive atmosphere with Christmas markets and decorations. Both countries have rich cultural heritage and delicious cuisine to enjoy. Ultimately, it comes down to whether you prefer a warmer climate or a more traditional holiday experience. **

Yes, a 17-year-old can travel to Portugal alone. However, it is important to check the specific travel regulations and requirements for minors traveling alone to Portugal, as they may vary depending on the country of origin. Additionally, it is advisable for the 17-year-old to have a notarized letter of consent from a parent or legal guardian, as well as proper travel documentation such as a passport and any necessary visas. It is also important for the 17-year-old to have a clear understanding of safety and emergency procedures while traveling alone. **