Landmarks

311 South Wacker Drive

Five translucent cylinders crown this 961-foot tower, lit after dark by 1,852 fluorescent tubes — the lantern at the top shifts color for holidays.

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Once the world's tallest reinforced-concrete building, 311 South Wacker's 85-foot glass-ceilinged winter garden was planned as a pedestrian shortcut to Union Station through a disused streetcar tunnel under the Chicago River — a link never completed. Inside, Raymond Kaskey's bronze "Gem of the Lakes" stands at the Wacker entrance beside a fountain whose shell shape is taken directly from the Chicago city seal.

What to look for

The northwest park — the largest green space in the Chicago Loop — is open to the public during warm months and hosts farmer markets and cultural festivals.

311 South Wacker Drive is one of 37 sights worth the detour in Chicago, all bundled offline in Voyage GO — download the Chicago pack and it sits on your map with no signal, filling your travel passport the moment you walk past.

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