Laos offers a unique experience for travelers exploring its landscapes and culture via motorcycle, thanks to its relatively undeveloped road networks that lead to less crowded destinations. Here are some popular cities and areas in Laos that are ideal for exploration on a motorbike:

1. **Luang Prabang:**
   - This UNESCO World Heritage site is perfect for motorbike exploration due to its scenic surroundings. You can venture out into nearby hilltops, villages, and the Nam Khan River. The road leading to Kuang Si Waterfall is also popular among bikers.

2. **Vientiane (Luang Prabang):**
   - As the capital city, Vientiane has a laid-back atmosphere with plenty of opportunities for motorbike trips. You can visit nearby attractions like Buddha Park and Nam Ngum Lake or take day trips to Pak Ou Caves.

3. **Vang Vieng:**
   - Known for its lush scenery, limestone karsts, and caves, Vang Vieng is a great base for motorbike excursions. The area around the town offers beautiful roads perfect for riding and exploring hidden waterfalls and caves like Tham Ting and Tham Sae.

4. **Savannakhet:**
   - Located in southern Laos near the Thai border, Savannakhet offers scenic rides through rice paddies and along the Mekong River. You can also visit the nearby Nam Ou Loop for stunning views of karst landscapes and waterfalls.

5. **Paksé:**
   - Known as the gateway to the Bolaven Plateau, Paksé allows you to explore the region's coffee plantations, hot springs, and beautiful mountain roads. The area around Tad Fane Waterfall is particularly scenic for motorbike rides.

6. **Thakhek:**
   - This city serves as a starting point for exploring the Plain of Jars in Xieng Khouang Province, renowned for its mysterious ancient stone jars scattered across rolling hills. The ride to Phonsavan is both exhilarating and visually rewarding.

7. **Xiengkhuang (Phonsavan):**
   - Besides visiting the Plain of Jars, you can take a motorbike tour around the region's other historical sites and enjoy the relatively empty roads leading through captivating landscapes.

8. **Paksong:**
   - Located in southern Laos near the Bolaven Plateau, Paksong is an excellent starting point for exploring coffee plantations and mountainous areas. The nearby Nam Et-Phou Loei National Biodiversity Conservation Area offers beautiful trails suitable for motorbikes.

When traveling by motorcycle in Laos, be sure to take safety precautions such as wearing a helmet, checking your vehicle's condition before heading out, and being mindful of road conditions, which can vary significantly. The less-traveled roads offer an opportunity to experience the country’s natural beauty and rural culture intimately.