This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

A unique museum where guests can rent and operate a locomotive.

A grandiose title could not save this mercantile community from obscurity.

Train fans from all over flock to this railroad viewing park where three lines converge.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

A remarkable feat of Victorian engineering across the Firth of Forth.

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A wartime promise becomes a shrine to Our Lady of Lourdes.

Symbolic attempt to overcome the issues of life.

Train cars and railroad artifacts abound at this restaurant devoted to railway history.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

Striking images of New Orleans history, including colonizers, soldiers, Klansmen, scientists, sharecroppers, and more, are depicted in frescoes that line the walls of this transportation hub.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

America's post-nuclear-attack chambers of Congress.

The world's largest fully steerable radio telescope.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

Former meatpacking facility turned vertical farm and sustainable business complex.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

This incredible narrow-gauge mountain railway was created by a ceramic artist.