The buses have been operational since May 30 in Vietnam's capital, Hanoi. The tour route includes 14 stops, 25 streets, and 30 attractions.

These buses run daily tours every 30 minutes, starting at 9:00 AM and ending at 6:10 PM. The second floor of the bus is an open-top deck without a roof, which provides a better view of the city and allows for great photos of tourist spots.

When purchasing a bus ticket, you can additionally receive special headphones with an audio guide recording that will talk about the city's history and its key attractions along the tour route. There are 9 languages to choose from, including Russian.

Interestingly, the bus meets the Euro-4 emission standard, which already helps address complex environmental challenges in the world.

Among other amenities, the bus features Wi-Fi, a USB port for charging gadgets, and a small refrigerator.

The goal of introducing such buses is to boost tourism development in the country's capital.

Tickets cost 300,000 VND ($13.3) for a 4-hour tour, 450,000 VND ($20) for 24 hours, and 650,000 VND ($28.8) for 48 hours.

Plans are underway to launch cheaper tickets without Hop-on Hop-off services. Their feature is that passengers will not be able to get off the bus at any moment and board the next one for free after some time.