Here's your complete 15-week European holiday, now including the 2 nights in Lagos, Portugal, as part of Week 13:

Week 1: Paris & Surroundings, France

• Days: 7
  
• Base: Paris (4 nights)
  
  • Things to do: Eiffel Tower, Louvre, Montmartre, Musée d'Orsay, Champs-Élysées, Seine River cruise, Latin Quarter.
    
• Day Trips:
  
  • Versailles (1 hour) - Explore the grand palace and gardens.
    
  • Giverny (1.5 hours) - Monet’s gardens.
    
  • Fontainebleau (1 hour) - Château de Fontainebleau.
    
• Why: Explore the art, culture, and beauty of Paris, then venture to nearby royal estates and gardens.
  

Week 2: Loire Valley & Brittany, France

• Days: 7
  
• Base 1: Loire Valley (3 nights)
  
  • Things to do: Château de Chambord, Château de Chenonceau, Amboise, Tours.
    
• Base 2: Nantes (2 nights)
  
  • Things to do: Explore the modern city, the "Machines of the Isle of Nantes," Château des Ducs de Bretagne.
    
• Base 3: Saint-Malo (2 nights)
  
  • Things to do: Walk the city walls, visit the beaches, and take a ferry to Îles Chausey.
    
• Why: A perfect blend of medieval history, coastal beauty, and vibrant city life.
  

Week 3: Dordogne & Southern France

• Days: 7
  
• Base 1: Dordogne (3 nights)
  
  • Things to do: Sarlat, Lascaux caves, canoe on the Dordogne River, and villages like Domme and La Roque-Gageac.
    
• Base 2: Carcassonne (2 nights)
  
  • Things to do: Visit the medieval fortified city, Château Comtal, and walk through the cobbled streets.
    
• Base 3: Toulouse (2 nights)
  
  • Things to do: Basilica of Saint-Sernin, Capitole de Toulouse, Cité de l'Espace (space museum).
    
• Why: Explore the history and charm of medieval towns, with a mix of adventure and culture.
  

Week 4: Provence & French Riviera

• Days: 7
  
• Base 1: Avignon (2 nights)
  
  • Things to do: Palais des Papes, Pont Saint-Bénézet, and explore the medieval streets.
    
• Base 2: Gordes & Roussillon (2 nights)
  
  • Things to do: Explore these charming hilltop villages, wander through lavender fields, and enjoy local food.
    
• Base 3: Nice (3 nights)
  
  • Things to do: Visit the Promenade des Anglais, Old Town, take a day trip to Eze and Monaco, relax by the Mediterranean.
    
• Why: A mix of historical exploration and relaxation on the French Riviera.
  

Week 5: Northern Italy (Liguria & Tuscany)

• Days: 7
  
• Base 1: Cinque Terre (3 nights)
  
  • Things to do: Hike between the villages, visit Monterosso, Vernazza, Riomaggiore, and take a boat ride.
    
• Base 2: Lucca (2 nights)
  
  • Things to do: Stroll along Renaissance city walls, climb Guinigi Tower, and bike around the town.
    
• Base 3: Pisa (2 nights)
  
  • Things to do: Leaning Tower of Pisa, Piazza dei Miracoli, Museo dell'Opera del Duomo.
    
• Why: Enjoy the Italian coastline, scenic hill towns, and the world-famous Leaning Tower.
  

Week 6: Tuscany & Umbria, Italy

• Days: 7
  
• Base 1: Florence (3 nights)
  
  • Things to do: Uffizi Gallery, Florence Cathedral, Ponte Vecchio, Piazza della Signoria.
    
• Base 2: Siena (2 nights)
  
  • Things to do: Piazza del Campo, Siena Cathedral, and the historic city center.
    
• Base 3: Perugia (2 nights)
  
  • Things to do: Visit the medieval city, explore Perugia’s Etruscan ruins, and sample the local chocolate.
    
• Why: Experience the art, history, and food of Tuscany and Umbria, with fewer crowds than Florence.
  

Week 7: Lake District, Italy & Switzerland

• Days: 7
  
• Base 1: Lake Como (3 nights)
  
  • Things to do: Visit Bellagio, Varenna, Como, and Villa Carlotta.
    
• Base 2: Lugano, Switzerland (2 nights)
  
  • Things to do: Walk along Lake Lugano, visit Parco Ciani, and explore the Old Town.
    
• Base 3: Zermatt, Switzerland (2 nights)
  
  • Things to do: Matterhorn, Gornergrat Railway, car-free town.
    
• Why: A mix of stunning lakeside views in Italy and Alpine beauty in Switzerland.
  

Week 8: Swiss Alps & Austria

• Days: 7
  
• Base 1: Lucerne, Switzerland (3 nights)
  
  • Things to do: Chapel Bridge, Lake Lucerne, Mt. Pilatus, Old Town.
    
• Base 2: Innsbruck, Austria (2 nights)
  
  • Things to do: Golden Roof, Imperial Palace, Nordkette cable car.
    
• Base 3: Salzburg, Austria (2 nights)
  
  • Things to do: Hohensalzburg Fortress, Mozart’s birthplace, and Mirabell Gardens.
    
• Why: Explore Swiss lakes, Alpine landscapes, and Austrian cultural gems.
  

Week 9: Germany (Bavaria & Nuremberg)

• Days: 7
  
• Base 1: Munich (3 nights)
  
  • Things to do: Marienplatz, Nymphenburg Palace, English Garden, beer halls.
    
• Base 2: Füssen & Neuschwanstein Castle (2 nights)
  
  • Things to do: Visit the fairy-tale castle, explore Füssen's Old Town.
    
• Base 3: Nuremberg (2 nights)
  
  • Things to do: Nuremberg Castle, Germanisches Nationalmuseum, Old Town.
    
• Why: Bavarian culture, stunning castles, and medieval towns.
  

Week 10: Czech Republic & Austria

• Days: 7
  
• Base 1: Prague (3 nights)
  
  • Things to do: Prague Castle, Charles Bridge, Old Town Square, St. Vitus Cathedral.
    
• Base 2: Brno (2 nights)
  
  • Things to do: Visit Špilberk Castle, Brno’s Old Town, and the Moravian Karst caves.
    
• Base 3: Vienna (2 nights)
  
  • Things to do: Schönbrunn Palace, Belvedere Museum, Naschmarkt.
    
• Why: Explore the cultural riches of Prague and Vienna, both iconic European capitals.
  

Week 11: Spain - Madrid & Toledo

• Days: 7
  
• Base 1: Madrid (3 nights)
  
  • Things to do: Royal Palace, Prado Museum, Retiro Park, Royal Botanic Garden.
    
• Base 2: Toledo (2 nights)
  
  • Things to do: Alcázar of Toledo, Toledo Cathedral, Jewish Quarter.
    
• Base 3: Segovia (2 nights)
  
  • Things to do: Roman aqueduct, Alcázar of Segovia, Segovia Cathedral.
    
• Why: Discover the art, history, and architecture of Spain’s vibrant cities.
  

Week 12: Spain - Andalusia

• Days: 7
  
• Base 1: Seville (3 nights)
  
  • Things to do: Alcázar Palace, Seville Cathedral, Plaza de España, Flamenco show.
    
• Base 2: Córdoba (2 nights)
  
  • Things to do: Mezquita, Alcázar de los Reyes Cristianos.
    
• Base 3: Granada (2 nights)
  
  • Things to do: Alhambra Palace, Generalife Gardens, Albaicín neighborhood.
    
• Why: Explore the beauty and history of Andalusia, famous for its Moorish architecture.
  

Week 13: Portugal - Lisbon, Sintra & Lagos

• Days: 7
  
• Base 1: Lisbon (3 nights)
  
  • Things to do: Belém Tower, Jerónimos Monastery, Alfama district, Tram 28.
    
• Base 2: Sintra (2 nights)
  
  • Things to do: Pena Palace, Quinta da Regaleira, Moorish Castle.
    
• Base 3: Lagos (2 nights)
  
  • Things to do:
    
    • Beaches: Praia Dona Ana, Praia do Camilo, Ponta da Piedade.
      
    • Historic Sites: Forte da Ponta da Bandeira, Mercado de Escravos.
      
    • Old Town: Explore the charming cobbled streets and enjoy the local restaurants.
      
• Base 4: Cascais (2 nights)
  
  • Things to do: Explore the beaches, visit Boca do Inferno, and wander the town center.
    
• Why: Lisbon offers rich history, Sintra’s palaces are iconic, and Lagos adds coastal beauty with cliffs and stunning beaches.
  

Week 14: Portugal - Porto & Douro Valley

• Days: 7
  
• Base 1: Porto (3 nights)
  
  • Things to do: Ribeira district, Livraria Lello, Porto Cathedral, wine tasting.
    
• Base 2: Braga (2 nights)
  
  • Things to do: Visit Bom Jesus do Monte, Braga Cathedral.
    
• Base 3: Douro Valley (2 nights)
  
  • Things to do: Vineyards, boat ride on the Douro River, wine tasting.
    
• Why: Explore the historic cities and wine regions of northern Portugal.
  

Week 15: Spain - Barcelona & Costa Brava

• Days: 7
  
• Base 1: Barcelona (4 nights)
  
  • Things to do: Sagrada Família, Park Güell, La Rambla, Gothic Quarter.
    
• Base 2: Tossa de Mar (3 nights)
  
  • Things to do: Tossa de Mar beach, medieval castle, visit the charming old town.
    
• Why: End your trip with the modernist beauty of Barcelona and the stunning beaches of the Costa Brava.
  

Summary of Your 15-Week Road Trip:

• Total Duration: 15 weeks
  
• Driving Time: Max 4 hours per day
  
• Stay in Each Place: 3–4 nights
  
• Highlights: A grand European adventure across France, Italy, Switzerland, Austria, Germany, the Czech Republic, Spain, and Portugal, blending history, culture, nature, and food along the way.
  

Let me know if you’d like to adjust or add anything else!