Sure, here are some specific no-fly travel ideas in Europe, with transport means and destinations:
Train travel: Take the Eurostar train from London to Paris, and then continue on to other destinations such as Brussels, Amsterdam, or Frankfurt. The train is a comfortable and efficient way to travel, and you can enjoy the beautiful countryside along the way.
Bus travel: Take a bus from Rome to Florence, and then continue on to other destinations such as Venice, Milan, or Pisa. Bus travel is an affordable and eco-friendly way to explore Italy.
Car rental: Rent a car in Germany and take a road trip through the beautiful Bavarian countryside. Visit destinations such as Munich, the castles of the Rhine Valley, and the Black Forest.
Bicycle touring: Take a cycling holiday in Denmark. Many Danish cities, such as Copenhagen, have extensive bike paths and bike-sharing schemes, making it easy to explore the country by bike.
Boat travel: Take a boat trip along the canals of Amsterdam and visit other Dutch destinations such as Utrecht, Rotterdam, or Delft. Boat travel is a great way to see the countryside and get a different perspective on the region.
Walk or hike: Take a walking holiday in the Swiss Alps, where you can explore picturesque mountain villages and enjoy the beautiful scenery.
Staycations: Take a trip to the Scottish Highlands by train or bus and explore the natural beauty of the region, visit places like Edinburgh, Glasgow, Loch Ness, and more.