In the mood for a change of scenery, take a look underwater.

It's all of this jade light, it's forests of bull kelp, and some really dynamic animals

like wolfials, which kind of look like underwater muppets.

Today on Travel with Rick Steve's, Amanda Castleman

unveils the underwater worlds of the diving enthusiast.

And Stephen Skeep takes a closer look at the cities we live in, especially the explosion

of mega cities in places like Pakistan and the issues these

huge cities raise for all the places we call home.

What kind of a country do we want to live in?

What kind of a city do we want to live in? What kind of a neighborhood should this be? What kind of a

civilization do we want to be a part of? And Scott Wallace finds that even in the

Amazon, tensions can run high when you venture into the territory of one

of the last tribes to escape contact with the rest of us.

The only dialogue between them and the outside world has been one of flying bullets in one direction and flying arrows in the other.

Let's plunge into the world together. It's Travel with Rick Steeves.

If you think it's getting crowded where you live, take a closer look at countries like Bangladesh, India, China, even Colombia and Pakistan.

They lead the list of countries with the densest metro areas in the world.

Coming up today on Travel with Rick Steeves, dens how we all live. We'll hear what he discovered in Karachi, Pakistan, a mega city whose population

has just exploded in the last two generations, and what lessons it can teach all of us in the

cities we call home. Or would you rather be left alone?

We'll also talk with Scott Wallace.

Scott was part of a National Geographic team that went deep into the Amazon,

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