8 remarkable skyscrapers and mega-projects that will debut in American cities in 2018

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Across the United States, cities are in the middle of a construction boom.

And several projects are nearly complete — from a skyscraper dubbed the "Jenga Tower" in Austin, Texas to a neighborhood of hundreds of townhouses in Detroit, Michigan.

Here are some of the most ambitious development projects that will open in 2018.

The Comcast Technology Center in Philadelphia, Pennsylvania

When complete in mid to late 2018, this 60-story skyscraper will become the tallest tower in Philly.

The Foster+Partners-designed tower will include a Four Seasons Hotel on its top levels, and offices for Comcast employees on the lower levels.

Solstice on the Park in San Francisco, California

Designed by the Chicago-based firm Studio Gang, Solstice on the Park is a tower that will include 250 apartment units. The architects oriented the facade at 72 degrees, the optimum angle to maximize sunlight in winter for passive solar power and minimize light and heat gain during summer to lower air-conditioning usage.

The 26-story project is expected to open by late spring of 2018.

3 World Trade Center and St. Nicholas Greek Orthodox Church in New York, New York

As part of the new World Trade Center site in downtown Manhattan, 3WTC by famed architect Richard Rogers will stretch 1,079 feet and house retail and offices. The tower topped out in 2016, and will open by spring of 2018.

Nearby, the St. Nicholas Greek Orthodox Church will soon open, too. Designed by architect Santiago Calatrava, the $50 million project will replace the church that was lost in the September 11 attacks.

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