In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

The ruined remains of an early hydroelectric dam.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.