This is a another variation on cache types: a Virtual Cache. There is no cache container. This can be a great type of cache where the container itself might get in the way (like a historic site). To claim credit for this cache, you need to answer some questions.
If you are with a guide or volunteer, answer the questions to your guide. If you are doing this on your own without an educational group, then email the answer to the cache owner.
In what year did Bluemont Junction serve as the hub of the multi line Washington & Old Dominion Railway?
What does John McLean have to do with these railroads?
A Google Map shows the Full ACES Course.Cache is hidden in an Arlington County Park consistent with known Arlington County Parks geocaching policy. Please only search during park hours.
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Look on the historical signs for the answers