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After Amazon in September that it would build a second headquarters in an undetermined location, concocted bids to persuade the company to choose it.

The company’s new campus, called HQ2, will bring 50,000 new jobs, Amazon says. Amazon will invest $5 billion in its construction, making the offer one of the largest corporate-civic opportunities in recent American history.

Proposals are not due until Thursday, but many cities have already disclosed their plans to woo Amazon. And some are more extreme than others.

Here are a few of the most out-there bids.

Texas Central Rail Co.

Dallas — a development that would surround a proposed station for a $15 billion bullet train.

Developers from the firms Matthews Southwest and Texas Central Partners are for Amazon’s HQ2 campus, according to the Dallas Business Journal. It would surround a proposed station for a bullet train, which Dallas magazine reports is expected to cost . If fully approved by the city, the 240-mile line would transport passengers from Houston to Dallas in 90 minutes.

Houston Mayor Sylvester Turner for the train plan, which is likely to happen with or without Amazon. Developers hope to start construction on the development by late 2018.

Dallas Midtown

Dallas — the site of a former (nearly dead) shopping mall.

One of the comes from three Dallas developers who want Amazon — the ecommerce giant that — to move into the old site of the Valley View Mall.

Dallas News reports that the proposal of a 500,000-square-foot office building, which would be a part of a larger 430-acre district.

The building’s this summer. Now only a theater, a few art galleries, some pizza joints and a smoothie shop remain.

Plaza Companies and Holualoa Companies

Phoenix — a proposal to move inside a renovated version of the city’s first shopping mall.

There seems to be a trend of cities proposing dilapidated shopping malls as the site for HQ2. Phoenix officials are likely to , according to multiple sources who spoke with the Phoenix Business Journal.

Park Central was the city’s first mall when it opened in the 1950s. The mall’s clothing stores shut down several years ago, and today there is just a Starbucks, a few restaurants, offices and a data center.

Cities in New Jersey — $7 billion in tax incentives.

In early October, Gov. Chris Christie and legislative leaders said they would over the next decade if the company decides to build there, according to Bloomberg.

The plan would expand a subsidy program, , and provide economic incentives for companies (like Amazon) that launch “transformative projects” (like HQ2).

The proposed bill would raise the cap on subsidies from $5,000 to $10,000 for every job Amazon creates. Christie said he by mid-January.

Natalia Bratslavsky / Shutterstock.com

Memphis, Tenn. — $60 million in tax incentives.

Memphis will offer to Amazon, according to The Commercial Appeal.

The Memphis City Council voted on Oct. 3 to offer the tax breaks for the company’s headquarters, possibly in addition to incentives from , Shelby County and the state.

City of Frisco, Texas/Twitter

Frisco, Texas — an offer to build the rest of its city around Amazon.

Frisco, Texas, turning its small city — a population of about 160,000 over 62 square miles — into a company town dominated by Amazon.

“Our city’s only about 60 percent built out, so we’ve got a lot of available land where we can build to suit,” Mayor Jeff Cheney . “We play to win. We’re innovators. We’re forward thinkers, and we’re serious.”

Stonecrest, Georgia — a proposal to rename itself after Amazon,

The town of Stonecrest is pledging to if the company chooses it for HQ2, the Atlanta Journal-Constitution reported.

In early October, Stonecrest’s City Council voted 4-2 in favor of the name change. The town would also devote 345 acres to the campus.

“There are several major U.S. cities that want Amazon, but none has the branding opportunity we are now offering this visionary company,” Mayor Jason Lary .

Shop/West 8

Philadelphia — three sites that would collectively span 28 million square feet.

Amazon existing buildings of at least 500,000 square feet and total site space of up to 8 million square feet.

Philadelphia would have that covered. Its officials are that would collectively span an estimated 28 million square feet in the city, The Philadelphia Inquirer reported.

The unfinished developments — Schuylkill Yards, uCity Square and Navy Yard — already include millions of square feet of offices, retail, transit lines and residential spaces.