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Book 24, Question 95 · Video

Why do some cities build walkways underground?

Video · 1:54 · Crafty Clover explains, from A Million Whys Book 24

In cold, snowy places, underground walkways let people travel between buildings and subway stations without going outside. Toronto's PATH has about 19 miles of connected tunnels, with shops and cafés. Montreal has a similar network. They keep you warm, dry, and away from traffic.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why do some cities build walkways underground?

The Big Idea

In some cold cities, you can walk for miles underground! No coat needed. Let's explore these hidden walkways.

Stay Inside

Step one: Stay Inside. In cold, snowy places, underground walkways let people travel between buildings and subway stations without going outside. They keep you warm and dry.

Toronto's PATH

Step two: Toronto's PATH. Toronto's PATH has about 19 miles of connected tunnels, with shops and cafes. Montreal has a similar network.

Planning

Step three: Planning. Engineers must plan lighting, air, signs, and safe exits. The walkways also keep people away from traffic.

A Closer Look

Let's take a closer look! Buildings connect. Subway stations link in. Shops line the halls. Signs show the way.

Quick Facts

Quick facts! Toronto's PATH is one of the largest underground shopping complexes in the world. Colorful signs help people find their way. Underground walkways are great on snowy days. Underground walkways have many safe exits.

Think Like a Scientist

Now, think like a scientist! Draw a map of an underground walkway. Connect four buildings. Add signs that help people find their way. Add safe exits. Where would you put a shop?

Outro

Some cities build underground walkways so people can travel warm and dry between buildings and subways. Toronto's PATH has about 19 miles of tunnels with shops and cafes. Science is amazing! Keep asking questions! The more you look around, the more wonders you will find, so keep your eyes open! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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