ABC means Annapurna Base Camp and EBC Everest Base Camp. ABC is the base of the tenth highest mountain, and EBC is the base of the world's highest mountain, Mt. Everest. These two mountains are situated in two different regions Annapurna Himalayas (in the Annapurna region) and Eastern Himalayas (in the Khumbu region). Both treks offer very distinct trekking experiences, views, and cultural heritage of the locals.