An Absolute Beginner, no practice, no experience, not even a regular cyclist! I must be crazy :)
Stephen Peel

Stephen Peel

Cycling Around the World

Antipodal (Tunnel) Map

 
 

In the image below, you can see how you can just move the cross-hair around on either side to get the opposite antipodal point on the other. Click on the link above to go to the actual interactive map