A cache in disguise.
This is the first of a multi-team cache to encourage the urban lunch time cachers to venture out. But beware of this one. It's overlooked by a few hundred workers in the office over the road who might just wander what you're up to!
This cache is best hunted for using extreme stealth if you are a lunchtime cacher. Alternatively, early morning or using the cover of darkness. You are looking for a a well disguised cache. 
You may need a tool to extract log.
Please replace carefully as found.