Helicopter sightseeing tours are expensive for several reasons. Firstly, the cost of operating and maintaining a helicopter is high, including fuel, maintenance, and insurance. Additionally, the limited seating capacity of helicopters means that the cost per passenger is higher compared to larger aircraft. Furthermore, the demand for helicopter sightseeing tours is often high, allowing operators to charge a premium for the experience. Finally, the unique and thrilling nature of helicopter tours also contributes to their higher price point. **

City tours can be very interesting as they provide an opportunity to learn about the history, culture, and landmarks of a city. They offer a guided experience that can give visitors a deeper understanding of the city's significance and unique characteristics. City tours often include interesting facts, stories, and insights that may not be easily accessible to someone exploring the city on their own. Overall, city tours can be a fun and educational way to explore a new destination. **

City tours can vary in length depending on the specific tour and the city being visited. Some city tours may be as short as 1-2 hours, while others can last half a day or even a full day. It's important to check the details of the specific city tour you are interested in to find out its duration. **

You can find comfortable sandals for sightseeing tours at outdoor and travel stores, as well as online retailers that specialize in travel and outdoor gear. Look for sandals with cushioned footbeds, adjustable straps, and good arch support to ensure comfort during long walks and sightseeing. Brands like Teva, Chaco, and Keen are known for making durable and supportive sandals that are great for walking and exploring. **

As an AI language model, I do not have access to real-time information or personal experiences. However, Ikarus Tours is a well-known tour operator that offers a variety of travel packages and services. It is always recommended to read reviews from past customers or seek recommendations from friends or family who may have used their services to get a better understanding of their reputation and quality of service. **

The series about helicopter sightseeing tours is called "Medicopter 117." It is a German television series that follows the adventures of a team of helicopter medics as they respond to emergencies and perform rescue missions. The show is known for its thrilling aerial footage and dramatic storylines. **

City bikes are generally designed for shorter commutes and leisurely rides around urban areas. They are not typically built for longer bike tours, as they may lack the necessary gears, suspension, and comfort features for extended rides. If you are planning to go on longer bike tours, it would be more suitable to use a touring bike or a hybrid bike, which are specifically designed for longer distances and varied terrains. These types of bikes are equipped with features such as multiple gears, wider tires, and more comfortable seating to provide a smoother and more enjoyable experience for longer rides. **

Marco Polo group tours are organized travel experiences where a group of people join together to explore various destinations under the guidance of a tour leader. These tours typically include a pre-planned itinerary, accommodations, transportation, and some meals. Travelers on Marco Polo group tours have the opportunity to visit multiple attractions, learn about the local culture, and connect with like-minded individuals in a social setting. These tours are a popular choice for those who prefer the convenience and camaraderie of traveling in a group. **