After walking back to Georgetown we hired bikes from the local bike store which unfortunately didn’t open till 10 am , and there was a queue ! We rode along the Mt vernon trail to Mt Vernon. Mostly it is a bitumen shared trail and mainly well marked , except at halfway point just out of Alexandria and we found ourselves well off the track .The round trip ended up t 62 km mainly on a shaded trail next to the Potomac river. We went for a tour of George Washington’s estate .The buildings were mainly in the style as it would have been back in the late 1700s. It was a large plantation and there were around 300 saves employed. Washington later renounced slavery as being incompatible with a free USA and later freed his slaves in his will. The ride home was pleasant especially as we knew the way. After dropping the bikes back we walked back toward the Arlington cemetery. This is a huge lawn cemetery with sacred stones , with bout 400,000 buried there.