This is a NASA Hubble Space Telescope near-infrared image of a pillar of gas and dust, three light-years tall, that is being eaten away by the brilliant light from nearby stars in the tempestuous stellar nursery called the Carina Nebula, located 7500 light-years away in the southern constellation of Carina.
The longest distance one can travel on Earth without having to cross a large body of water! The route is 21,808 km long and starts in Cape Town, South Africa and only ends in Magadan, Russia. To give you an idea, this would be more than the half of earths circumference, which is 40,075 km. Temporally, it would take approximately 194 days of continuous walking (with no breaks) to complete the route. At a more leisurely pace, with stop rights and everything else, it would take more than three years to complete the line. Would you be able to walk it if you had the time?