Sure, here’s the translated bicycle trip program as HTML text in English:
```html
Day 1: Nevers
Individual arrival in Nevers. After settling your luggage, take the opportunity to visit the beautiful city of Nevers with its ceramic workshops, famous for the blue monochromatic motifs and the Ducal Palace, considered one of the first castles on the Loire, residence of the counts and dukes of Nevers.
Day 2: Nevers – La Charité sur Loire (45 km; +179m)
This first bike segment will take you to Cuffy, the starting point of the La Loire à Vélo cycle route. You then continue towards the monastic city of Charité-sur-Loire, where you will cross the oldest bridge on the Loire, dating back to the 16th century, reaching the Romanesque church of Notre Dame.
Day 3: La Charité sur Loire – Sancerre or Chavignol (38 km; +202m or 36 km; +332m)
The stage will begin within the National Natural Reserve of the Loire Valley, passing through vineyards and near the bell tower of the church of Pouilly-sur-Loire. You then continue through fields and woods towards the famous vineyards of Sancerre. Take the opportunity to stop at a local producer to taste a glass of Sancerre Blanc, perhaps with the typical goat cheese Chevignol. From Sancerre, dominated by the remains of the feudal castle, the tower of Tour des Fiefs, you can enjoy a splendid view of the valley.
Day 4: Sancerre or Chavignol – Briare (50 km; +148m or 236m)
You leave Sancerre cycling along the Canal Lateral towards Bannay and Cosne-sur-Loire, a flowery city offering splendid landscapes on the Loire. You continue on the bike paths of La Loire à Vélo to Belleville-sur-Loire, Beaulieu-sur-Loire, and Briare, whose canal bridge, the largest in France, is an authentic work of engineering art.
Day 5: Briare – Sully sur Loire (40 km; +173m)
You cross the Loire cycling on the canal bridge and continue towards Saint-Brisson-sur-Loire, with its medieval fortress. You then reach the beautiful town of Gien with its exceptional panoramic view. Finally, continue towards Sully-sur-Loire and its remarkable medieval castle, surrounded by moats overlooking the Loire.
Day 6: Sully sur Loire – Orléans (50 km; +131m)
Today, wonderful landscapes will accompany you to Saint-Benoit-sur-Loire and its Benedictine abbey, founded in 640, whose church is one of the most remarkable Romanesque works in France. You then proceed to Châteauneuf-sur-Loire, one of the main ports on the Loire during the 18th century, before reaching Orléans, an Art and History City liberated in 1429 by Joan of Arc from the English siege.
Day 7: Orléans – Beaugency (26 km; +86m)
After an essential visit to the historic center of Orléans and the sumptuous Cathedral of Sainte-Croix, you leave the city following the cycle paths of La Loire à Vélo along the banks of the Loire, first to the beautiful Château de Meung-sur-Loire, and then to the flowery town of Beaugency, dominated by the 11th-century tower.
Day 8: Beaugency – Blois (45 km; +131m)
You leave Beaugency and head towards Blois, a town with a rich past whose castle perfectly illustrates the evolution of French architecture between the Middle Ages and the 17th century. Discover the unique landscapes of the Sologne region and, of course, the Château de Chambord, a true masterpiece of the French Renaissance.
Day 9: Blois – Amboise (40 km; +200m)
Today's itinerary will take you cycling on the bike paths of the Pays des châteaux, through small villages and to the Château de Chaumont-sur-Loire, majestically overlooking the river and the village below. You then reach Amboise with its Royal Castle, within which, in the chapel, lies the tomb of Leonardo da Vinci. A short walk from here is the Clos Lucé manor, where the Italian genius spent the last years of his life.
Day 10: Amboise – Tours via Chenonceaux (30 km; +100m or 53km; +283m)
Cycling among the vineyards of Vouvray or Montlouis, you can discover the many cellars producing the refined white wines of the area. You then continue to the Château de la Bourdaisière, where Gabrielle d'Estrées, the favorite of King Henry IV, was born. Finally, you reach the city of Tours, where we recommend exploring the old town, whose vibrant heart is Place Plumereau, a lively square framed by typical half-timbered houses and animated by the terraces of cafés and restaurants facing it.
Day 11: Tours – Azay le Rideau (44 km; +95m)
First, you reach the village of Savonnières where, if you wish, you can visit the site called the Petrifying Caves, so named because here water turns into stone or rather, into extraordinary white limestone creations. You then continue to the Château de Villandry, famous for its gardens, unique in Europe, where flowers mix with fruit trees, vegetables, and aromatic herbs. The itinerary continues passing through Saché, the home museum of the writer Honoré de Balzac, and ends in Azay le Rideau, where you can admire the splendid Renaissance castle, a jewel set in the Indre river.
Day 12: Azay le Rideau – Chinon (35 km; +200m)
Departure in the morning towards Langeais and its 15th-century fortress castle. You then continue to the Château d'Ussé, whose turrets, pinnacles, and dormers inspired Perrault in creating his famous fairy tale Sleeping Beauty. You will spend the evening in the beautiful medieval town of Chinon, on the banks of the Vienne river, famous for its elegant red wines.
Day 13: Chinon – Saumur (36 km; +200m)
Before leaving Chinon, visit one of the cellars where the famous red wine is aged. The itinerary then continues to the Abbey of Fontevraud, one of the largest monastic complexes in Europe, where the tombs of kings belonging to the Plantagenet dynasty are kept. The tour ends in the beautiful town of Saumur. You will have the opportunity to reach the Fontevraud Abbey, the largest remaining monastic complex in Europe, which is also the necropolis of the Plantagenet kings! (+12km)
Day 14: Saumur – Angers (58 km; +304m)
The itinerary follows the course of the Loire initially, then crosses the Anjou vineyards. You finally arrive at the tranquil city of Angers with its imposing castle fortress, which houses the largest medieval tapestry in the world: the Apocalypse Tapestry.
Day 15: Angers – St Florent le Vieil or Ancenis (50 km; +246m or 65 km; +326m)
Today you will cycle through the heart of the Anjou vineyards, such as Coteaux de la Loire and Coteaux de l'Aubance. We recommend visiting Savennières before reaching the surprising river island of Chalonnes, one of the largest in the Loire Valley. A beautiful stage through typical villages and natural landscapes where life flows at the slow pace of the river, up to the village of Saint Florent le Vieil or Ancenis.
Day 16: St Florent le Vieil or Ancenis – Nantes (55 km; +125m or 40 km; +95m)
Cycling along the banks of the Loire, you will have the opportunity to cross a great variety of natural landscapes, habitats for much wildlife and river birds. A quiet stretch on a bike path will take you to Champtoceaux, immersed in one of the most beautiful landscapes of the Loire and located at the border between Anjou and Brittany. The itinerary follows the course of the Loire to Nantes, the capital of the Loire Atlantique department and one of France's most dynamic cities with immense historical, artistic, architectural, and cultural heritage, which you can discover by strolling through its numerous pedestrian streets.
Day 17: Nantes – Saint-Brevin-Les-Pins (58 km; +178m)
You leave the city crossing the river on a small boat and continue on the bike paths of La Loire à Vélo. The itinerary then follows a narrow canal, crossing first a wetland and then the countryside until you reach the Loire estuary at St Brevin les Pins, a seaside resort with a large beach framed by sand dunes and a pine forest, the perfect place to enjoy some well-deserved relaxation at the end of the trip.
Day 18: Saint-Brevin-Les-Pins – Le Croisic (55 km + bus; +178m)
Today you will cycle from the Loire estuary to the wild coast of Le Croisic. You will start with a short bus ride crossing the Saint-Nazaire, the longest bridge across the Loire River connecting Saint Nazaire with Saint-Brevin-Les-Pins. Then take the time to discover the famous salt pans of the medieval city of Guérande. In the heart of a natural park, this medieval city offers many testimonies of its historical past. Then continue along the wild coast before reaching Le Croisic, a beautiful port and coastal town in the Loire Atlantique.
Day 19: Le Croisic
After breakfast, end of services and individual departure or extension of your stay.
```
This HTML text translates the provided Italian text into English while maintaining the original structure and formatting.