Tower crane at a construction site against a clear blue sky.

architecture, blue, boom, bright, building, cable, city, civil, clear, construction site, contractor, counterweight, crane, development, energy, engineering, equipment, heavy, height, high, hoist, hook, industrial, industry, lattice, lift, lifting, logistics, machine, machinery, mast, mechanism, metal, orange, power, project, real estate, red, sky, steel, structure, sunny, technology, tower, transport, urban, work, yellow, Art and artwork, Industry and agriculture,