References

1. Lonely Planet. Travel Guides and Tips. https://www.lonelyplanet.com
   Cited in: [Traveling in Europe](Category 1 - Destinations/Traveling in Europe.md)

2. CDC Travelers’ Health. Health Information for International Travel. https://wwwnc.cdc.gov/travel
   Cited in: [Health & Vaccination Tips](Category 6 - Safety & Health/Health & Vaccination Tips.md)

3. World Tourism Organization (UNWTO). Tourism Statistics and Trends. https://www.unwto.org
   Cited in: [Festivals Around the World](Category 5 - Culture & Experiences/Festivals Around the World.md)

4. Rick Steves. Travel Tips and Guides. https://www.ricksteves.com
   Cited in: [Creating Itineraries](Category 2 - Planning & Preparation/Creating Itineraries.md)

5. U.S. Department of State – Bureau of Consular Affairs. Travel Advisories and Passport Information. https://travel.state.gov
   Cited in: [Travel Documents & Passports](Category 2 - Planning & Preparation/Travel Documents & Passports.md)