Built in the 1940s, Big Boy No. 4014 retired in 1961 after traveling for more than one million miles. It's now making its way ...

Here is where you can see Big Boy No. 4014 in Kansas this week.

The US is preparing another historic coast-to-coast journey for Big Boy 4014, the world’s largest operating steam locomotive. Union Pacific Railroad’s 600-ton engine, based in Cheyenne, frequently ...

Union Pacific Big Boy No. 4014, the world's largest operating steam locomotive, is making its way through the Midwest.

Huge crowds of train fans turn out as the 1940s era Big Boy steam locomotive is making a rare trip cross country.

The hulking black train engine is the world’s biggest working steam locomotive, and is in the midst of a coast-to-coast tour ...

Union Pacific’s Big Boy No. 4014, the world’s largest operating steam locomotive, will travel through Lawrence once again, ...

CLEVELAND, Ohio — Big Boy No. 4014 is heading back through Ohio, and anyone hoping to catch the world’s largest operating ...

Union Pacific's Big Boy No. 4014 will arrive in Philadelphia on the 4th of July. Big Boy will visit Philadelphia for two days before continuing its tour to Lebanon, Pa. Big Boy is the largest ...

Union Pacific Big Boy No.4014 in action on the tracks - Logan Bush/Shutterstock Train enthusiasts are in for a treat this summer with the hugely anticipated tour from Union Pacific Big Boy No. 4014 ...

TAMA, Iowa (KCRG) - The largest operational steam train in the world stopped in Eastern Iowa Monday on a coast-to-coast tour for America’s 250th anniversary. “Big Boy” No. 4014 stopped in Tama and ...

Add Yahoo as a preferred source to see more of our stories on Google. The Union Pacific 4014 Big Boy locomotive passes by the crowd during the Union Pacific Railroad Coast to Coast Tour on June 5, ...