Imagine a colossal, mechanical heart, the size of a mountain range, pulsing with steam and intricate gears, powering a steampunk city built within its Chambers.. The city's inhabitants are tiny figures navigating vast, metallic caverns.

Colossal Mechanical Heart City ⚙️🏙️ A giant mechanical heart powering a steampunk city inside it, in an intricate steampunk illustration style.

Imagine a colossal, mechanical heart, the size of a mountain range, pulsing with steam and intricate gears, powering a steampunk city built within its chambers. The city's inhabitants are tiny figures navigating vast, metallic caverns. Rivers of lubricant flow like waterfalls, and immense pistons move rhythmically. The artwork is rendered in a detailed, intricate steampunk illustration style, with a palette of brass, copper, and dark iron, emphasizing the immense, industrial scale.