Adler Planetarium sundial and city skyline Chicago Illinois USA

adler planetarium blue sky building buildings chicago cityscape clock clocks close up closeup close up color colour curve curved curves curvilinear day daylight daytime exterior geometric horizontal il illinois landmark landmarks metal nobody outdoor outdoors outside panorama panoramic planetarium planetariums sculpture sculptures sightsee sightseeing skyline skyscraper skyscrapers steel strength sundial sundials time tourism tourist attraction travel travel destination us usa