1. Mars, also known as the Red Planet, has the largest mountain in the Solar System. Olympus Mons, located in the Tharsis region of Mars, is approximately 13.6 miles (22 kilometers) high, almost three times the height of Mount Everest.

2. Mars has the longest valley in the Solar System. Valles Marineris, named after the Mariner 9 spacecraft that discovered it in the 1970s, stretches over 2,500 miles (4,000 kilometers) long, 125 miles (200 kilometers) wide, and can reach depths of 23,000 feet (7 kilometers).

3. Mars is home to some of the largest dust storms in the Solar System. These storms can last for months, covering the entire planet and blocking out the sun, making it difficult for spacecraft to operate. In 2018, a massive dust storm caused NASA's Opportunity rover to lose contact and eventually end its mission.
### Instruction:
Tell me three interesting facts about Mars.

### Response:
