July 29

The lamp post is part of the Lab's Grizzly Peak substation located near Building 79, and down hill from Building 76.

This was a bit harder, with 85% of you getting the right location.

This week's winner of 499 Bucketlist points is:

Teresa Calarco, Materials Sciences.

So many of you put in extra work this week to find this location. Evelyn Davies went out walking to confirm the location, as did Marissa Smithwick who sent a selfie.

Marissa Smithwick took a selfie once she found it.

Look closely at this view of the substation and you can see a lamp post. We didn't say it would be easy.