What are some famous long-distance cycling routes worldwide worth recommending?

Hey, talking about this topic really gets me excited! Cycling to see the world is definitely one of the best experiences. There are so many routes, each with its own unique charm. I'll recommend a few representative and highly-regarded ones, so you can see which one suits your taste.

1. If you long for sunshine, the sea, and a relaxed atmosphere: The Pacific Coast Route, USA

This is arguably one of the most classic coastal cycling routes in the world. Imagine starting from Seattle, near Canada, or even further north in Vancouver, and cycling all the way south along the US West Coast to San Diego, the southernmost tip of California, right next to Mexico.

• Highlights: On one side, the azure Pacific Ocean; on the other, the vibrant Californian lifestyle. You'll ride through giant redwood forests, pass by major cities like San Francisco and Los Angeles, and discover countless charming coastal towns. The scenery is picturesque, and you'll witness spectacular sunsets every day.
• Difficulty: Not too challenging. The roads are mostly paved asphalt. While there are some ascents and descents, it's generally very cyclist-friendly. Supplies and accommodation are readily available along the way, making it ideal for a first long-distance cycling challenge or a purely leisurely cycling vacation.

2. If you enjoy history, culture, and tranquil pastoral scenery: The Danube Cycle Path, Europe

This is one of Europe's most popular and well-established routes. The Danube, often called the 'Mother River' of Europe, allows you to cycle along its banks, essentially traversing the history of several countries.

• Highlights: Starting from Germany's Black Forest, you'll pass through historic cities like Vienna in Austria and Budapest in Hungary. Along the way, you'll encounter ancient castles, peaceful villages, and endless vineyards. It's less about 'rushing through' and more about embarking on a flowing cultural journey.
• Difficulty: Very low! The path is mostly flat, and the cycle paths are exceptionally well-maintained, with clear signage that makes it hard to get lost. This route is perfect for families with children or cyclists who prefer a relaxed, enjoyable ride without too much exertion.

3. If you seek wild, magnificent nature and a sense of adventure: The Carretera Austral, Chile

This road holds an almost mythical status in cycling circles, known as the 'Southern Highway,' located in Chile's Patagonia region, near the end of the world.

• Highlights: The scenery is absolutely top-tier! Snow-capped mountains, glaciers, lakes more beautiful than emeralds, pristine forests... The landscapes here possess an untamed, wild beauty that will leave you awestruck at every turn. With sparse population, you can truly experience a sense of secluded tranquility.
• Difficulty: Very high. Many sections are unpaved dirt or gravel roads, the weather is unpredictable, and winds can be extremely strong. You'll need a reliable mountain or touring bike and be prepared for wild camping and self-catering. This route is suited for experienced adventurers who love a challenge.

4. If you want to push your limits and experience a spiritual pilgrimage: China's Sichuan-Tibet Southern Line G318

In Chinese cycling circles, this route holds an unshakeable status, often called a 'must-ride in this lifetime.' It's more than just a road; it's almost a belief.

• Highlights: Ascending from the Chengdu Plain all the way to the Qinghai-Tibet Plateau, the elevation change is immense. You'll witness snow-capped mountains, grasslands, canyons, and monasteries; the grandeur and diversity of the scenery are world-class. The Tibetan culture along the route is also incredibly captivating. Completing this route brings an unparalleled sense of accomplishment.
• Difficulty: Extremely high! The biggest challenge is altitude sickness, requiring time for gradual acclimatization. Continuous long ascents and descents are a huge test of physical endurance. Thorough physical and logistical preparation is essential before setting off.

In summary:

• Beginner/Leisure: The Danube is the top choice, followed by the US West Coast.
• Intermediate/Adventure: Try Chile's Carretera Austral.
• Ultimate Challenge: That would definitely be the Sichuan-Tibet G318.

In fact, there are many other great routes, such as New Zealand's Alps 2 Ocean, Vietnam's coastal route, and so on. The key is to decide what kind of experience you're looking for. Pick one that appeals to you, then start planning – the scenery along the way definitely won't disappoint!