4. The Hotel Montgomery (4,816 tons)

When the Hotel Montgomery opened in San Jose, Calif., in 1911, it was the epitome of luxury. By the 1990s, however, it was vacant, deteriorating and facing demolition. The space was needed to expand another upscale, modern hotel. But the newly elected mayor of San Jose told developers to find a way to save the Hotel Montgomery and build the expansion. It seemed like an impossible task, until a frustrated architect just asked, "Why don't we move it?" [source: Bartindale]

What started as a discouraged utterance turned out to be an inspiration, and in 2000, the 4,816 ton, four-story Hotel Montgomery moved 182 feet (55 meters) down the street [source: Bartindale]. The move itself cost $3 million, while the total project budget of more than $12 million covered engineering, seismic reinforcement and asbestos removal [source: Bartindale].

To some preservationists, moving the building wasn't ideal. An elegant ballroom had to be torn down to relocate the structure, and the first floor was gutted to install structural supports. But when it comes down to losing the building or modifying it, moving a building can be a good compromise. Sometimes buildings are restored to their original condition in their new location, but in this case, the Montgomery underwent additional renovation to become a serviceable hotel again. The Montgomery is now a stylish boutique hotel, so visitors to San Jose can still enjoy a modern hotel room in a historic building.

How do you move a building?
While moving a large building takes intense planning and coordination, the process boils down to a few simple steps. The builder cuts openings in the building's foundation and installs steel beams for structural support. Hydraulic jacks are also installed under the structure; the jacks are connected by a central control system that monitors the pressure on each jack and keeps the building level. The building is jacked up, rubber dollies are installed below and the structure begins its slow crawl to its new destination.

What move came to be known as the "Move of the Millennium"? You'll find out on the next page.