You can see images of creatures that have come into the area in the recent past. Upon manifesting this power in a given area, you can see all that has happened in the recent past.
You get a general feel for who has been present at the location and what they were doing there. You might be able to tell when the creatures in question left the area and how long they had been there before departing, determine a rough estimate of their numbers, and discern strong emanations of chaos, evil, good, or law.
The amount of information revealed depends on how long you study the location in question.
The number of creatures to last pass through the area (group or individual).
The type of creatures to pass through the area.
The length of time the creatures were in the area (up to the duration studied).
The general alignment of the creatures that were in the area.
What direction the creatures came from to get to the area.
What the creatures did while they were in the area.
What direction the creatures went when they left the area.
The next-to-last group of creatures in the area (repeat cycle with each previous group of creatures until concentration fails or duration elapses).
Creatures enjoying the benefit of mind blank or cloud mind (or similar effects) are not detected by psychometry.
For every additional power point you spend, you can increase the radius of the area by 10 feet.