The space shuttle Endeavor's $10 million-plus trip from LAX to the California Science Center in Exposition Park was quite an … endeavor.

The 12-mile trip Oct. 12 through Oct. 14 in 2012 was historic. Nothing so large had traveled so far on the already congested urban streets of Los Angeles. Street lights and traffic signals were moved, major boulevards were shut down and hundreds of trees were cut down.

This week the California Science Center announced that we're doing it all over again on May 21.

An unused, disposable external tank intended for use as the fuel source for the ill-fated shuttle Columbia will be the first such NASA equipment on display in the country.

It's called ET-94. It was donated by NASA.

The size of a 15-story building, it's longer than the Endeavor. However, it's not as wide because it has no wings. That could make the journey a little smoother.

The 65,000-pound tank will start its journey at NASA’s Michoud Assembly Facility in New Orleans on April 12, head via boat through the Panama Canal, and dock at Marina del Rey shortly before its arrival in Exposition Park May 21, center officials said.

It will be propped on dollies for its 13- to 18-hour truck-pulled trip through the streets of L.A. to the California Science Center’s Samuel Oschin Pavilion, they said.

The cost, covered by the nonprofit science center, was expected to be $3 million.

“The California Science Center's Samuel Oschin Air and Space Center will be the only place in the world that people will be able to go to see a complete shuttle stack — orbiter, external tank and solid rocket boosters — with all real flight hardware in launch configuration,” the CSC said in a statement.

Here's a map of the journey:

LA Weekly