Chicago is a lakefront giant: a city of skyscrapers and neighborhoods, with Lake Michigan on the east and a grid of streets, elevated trains and river bridges running everywhere else. It's the birthplace of the skyscraper, a major food and theater city, and a sports town (Cubs, White Sox, Bulls, Bears, Blackhawks).

Come for the architecture, the food and the lakefront, and expect to ride the "L." The city feels huge, but its neighborhoods are distinct and walkable.

Spring (April to May) is cool and changeable, warming into pleasant days by May. Parks bloom, and prices are fair.

Summer (June to August) is warm to hot and humid, packed with festivals, outdoor dining and lakefront beaches. Best for atmosphere, and the busiest and priciest.

Fall (September to October) has crisp air, golden light and fewer crowds. The marathon in October raises hotel prices.

Winter (December to March) is cold, with strong wind and snow. Holiday markets and lights are a draw; museums and theater work well. Best value.

Check the events calendar: Lollapalooza, the Chicago Marathon, big conventions and major concerts fill hotels and raise prices.

2 days covers the Loop, the Art Institute, an architecture cruise and deep-dish pizza.

3 days (recommended) adds a neighborhood day, a lakefront stretch and a proper evening of music or theater.

4 to 5 days adds more museums, a baseball game and a day trip (such as Oak Park for Frank Lloyd Wright homes).

Day 1, downtown and architecture: morning at Millennium Park (the Bean, Crown Fountain), then the Art Institute of Chicago. Afternoon on the Chicago Riverwalk and an architecture boat tour. Evening deep-dish pizza and a view from an observation deck.

Day 2, lakefront and neighborhoods: morning walk or bike on the Lakefront Trail, a stop at Lincoln Park or the zoo (free), and lunch in Lincoln Park or Lakeview. Afternoon in Wicker Park or the West Loop for shops and restaurants. Evening in a music club (blues, jazz or comedy).

Day 3, choose your own: the Museum Campus (Field Museum, Shedd Aquarium, Adler Planetarium), or a baseball game at Wrigley Field. Or go different: Hyde Park for the Museum of Science and Industry and the University of Chicago, or Oak Park for Wright's architecture.

The Loop and River North suit first-timers: walkable to major attractions and close to L lines.

The Gold Coast and Streeterville suit shopping and lakefront access: polished and a bit pricey.

The West Loop suits food: a hub of restaurants.

Lincoln Park and Lakeview suit a neighborhood feel, parks and Wrigleyville: calmer, with easy transit.

Wicker Park and Logan Square suit bars, music and a local scene: farther from downtown but on the Blue Line.

Chicago's "L" (elevated and subway trains) and buses run through the CTA. Use contactless payment or a Ventra card or app, and check the current fare options and day passes. The Blue Line is a 24-hour connection to O'Hare.

The Loop and nearby areas are very walkable. Divvy bikes and scooters are available, and rideshare and taxis are plentiful. The Metra commuter rail runs to the suburbs.

Driving downtown is expensive and slow, with high parking costs. Skip the rental car unless you're taking a long day trip.

Wind and cold: the lake breeze can drop temperatures sharply, even in spring. Dress in layers.

Food: try deep-dish and tavern-style thin-crust pizza, Italian beef sandwiches, Chicago-style hot dogs (typically no ketchup), and local craft beer. Book popular restaurants ahead.

Lakefront: high waves and storms sometimes close the Lakefront Trail and beaches. Follow signs and flags.

Taxes: sales and hotel taxes add noticeably to the bill.

Last call varies by bar and area; many close around 2 a.m., with some later on weekends. Tipping 18 to 20% is standard.

Chicago's downtown and most visitor areas are busy and well patrolled, and most visitors have no problems. Use normal big-city awareness: keep phones and bags secure on trains and in crowds, and be careful at night. Some neighborhoods away from the tourist core have higher crime; if you're unsure, ask your hotel and use rideshare after dark.

On the "L," stay alert, especially late at night, and sit in the car with the operator if you prefer. Winter safety matters too: ice and extreme cold can be dangerous, so cover exposed skin and watch for frostbite.

Emergencies: dial 911. Urgent-care clinics and pharmacies are common across the city. Chicago has major hospital systems near downtown. If you take prescription medications, bring a buffer supply.

Layers, a windproof jacket, comfortable walking shoes, a compact umbrella, and winter gear (hat, gloves, scarf, warm boots) from late fall through early spring. Sunscreen and a refillable water bottle in summer.