8 of the Most Unusual Tunnels in the World

The tunnels are mostly human creations that commonly pass through the mountains and hills. But there are tunnels that have a very unusual purpose, appearance or location. This is a list of tunnels that you can not see often, because they are rare or unique. That is why, some of them have become very popular tourist attractions.

Full post: 8 of the Most Unusual Tunnels in the World

0 comments: