This historic little railroad runs through some of the most beautiful scenery in Germany.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

A historic freight system that found the true gold rush is in tourism.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

One of the notorious Soviet leader Joseph Stalin's many summer retreats.

This unique sculpture is often overlooked by pedestrians.

This terrifying glass bridge on the side of a mountain cracks as you step on it.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

The latest in a series of long glass bridges suspended at terrifying heights.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

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

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

A breathtaking viewing platform over the Alps.

An architect transformed this abandoned cement factory into his castle-like workshop.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.