Gotthard Base Tunnel

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The designer of this railway tunnel added a birthday present for himself.

This former sugarcane transport tunnel is now a portal to a lovely beach.

A 1,000-foot-long railroad tunnel under Shavers Fork connected the towns during West Virginia's logging boom until its closure in 1985.

This heritage rail line meanders through Delaware’s Red Clay Valley.

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.