The Capital Wasteland is a post-apocalyptic setting in the video game Fallout 3. It represents a devastated version of the Washington, D.C. area after a nuclear war. The landscape is filled with ruins, mutated creatures, and remnants of pre-war civilization, creating a harsh environment for survivors. In the Capital Wasteland, players explore various locations, including the Capitol Building and Megaton, a settlement built around a live nuclear bomb. The area is populated by diverse factions and characters, each with their own stories and conflicts, contributing to the game's rich narrative and immersive experience.