Facebook retained Cornerstone Earth Group, Inc. to provide environmental and geotechnical engineering services for a 513,000 SF building similar in design to the adjacent Facebook Building MPK 20 – both designed by Gehry Partners. Gehry’s best-known works include the titanium-clad Guggenheim Museum in Bilbao, Spain, Walt Disney Concert Hall in Los Angeles, Louis Vuitton Foundation in Paris, France, Museum of Pop Culture in Seattle, New World Center in Miami Beach, Dancing House in Prague, MARTa Herford Museum in Germany, and 8 Spruce Street in New York City, among many others. Like MPK 20, parking will be tucked under the building to hide cars from view and allow more landscaping and less paving. Bridges will join the buildings and rooftop gardens together. The General Contractor is Level 10 Construction (L10), which has built more than 20 million square feet of construction projects in the Bay Area.