I could take the coin to visit the Northampton Lighthouse (Northampton is over 100 miles from the sea). It got its name from Terry Wogan a famous DJ and TV personality in UK refering to our lift tower in the town looking like a lighthouse (It was built to test lifts / elevators). It can be seen for miles and at night time it has a light at the top of it so it can be seen by planes. At Christmas it has a tree with lights st the top. Unfortunately the cache nearby is only a 35mm so will not fit in.
Will have to find just a normal cache for the coin, sorry!