1. What’s going on with all of these blue lines in the image below? You can find this oddly arranged water/earth combination at Google Maps link. There are several stories to discover here, but first–What is this? Why the strange water shapes?

2. Just below is picture of another oddly shaped and oddly colored bodies of water. Why are these giant oval things such different colors? Maps link.

3. While we’re in the odd-shapes-and-colors mode, what’s going on here? Why is the water so… red in some places and green in others? What causes the color changes? (Like the radio tower Challenge from last week, this is something I see nearly every time I fly into San Francisco. Big hint: This body of water is never the same color twice…)

4. There’s a story about the lake below that predates its existence. Before the lake was formed by building a dam, what was here? And why would they build a lake on top of it?

5. Same question as before: What WAS here… but now you have to cast your search skills back 10,000 years. What was in this location 10,000 years ago, and why is that interesting? (This is at lat/long 54.83333333, 2.333333333)