The highest mountain discovered is the Olympus Mons, which is located on Mars

 

The highest mountain discovered is the Olympus Mons, which is located on Mars.

Its peak is 16 miles (25 km) high, making it nearly 3 times higher than Mount Everest.

And not only is it tall, but it’s also 374,015 ft² (114,000 m²) wide – that’s an area the size of Arizona