United States
This is how some designers wanted the Trump border wall to look like, but they were turned down
About 200 prototypes were presented to build the border wall proposed by President Donald Trump. Some by way of protest and others quite serious, were rejected by the federal administration when the Customs and Border Protection (CBP) agency announced the start of construction of eight selected models. The chosen prototypes belonging to six construction companies have not been revealed. These are some of the designs that were rejected.

Aqueduct: Water flows on the north side to supply areas near a 22-foot high wall covered with solar panels that would generate electricity for sale to Mexico to finance construction. This proposal called for undocumented immigrants to participate in a one-year "special work program" that would give them limited US legal status.
Advanced Warning Systems.
The Curtain: A medieval castle style design that would make it difficult to climb while Border Patrol agents would have a better observation position.
San Diego Project Management.
Ecological: An alternative presented by a Miami company that is inspired by the natural landscape of the border, making a wall redundant.
Domo Architecture + Design.
Wall: A 'Great Wall of China' style design that includes a road along the top of the border.
Crisis Resolution Security Services Inc.
Solar: A concrete wall with solar panels to generate electricity to sell to Mexico and with that would pay its cost.
Gleason Partners.
Technological: The design of this company from San Diego, California would begin using drones to develop a three-dimensional space model of the terrain. The proposed wall would have cameras, microwave sensors and fiber optics designed to detect intrusions.
vScenario.
Memorial: A joint design by Iowa companies that would be constructed with reinforced concrete to make it more durable, with underground foundations that impede tunneling, as well as engravings to create a memorial monument.
Reilly Construction and Croell Inc.
Simple and basic: Light frame design based on precast concrete and mesh.
Quantum Logistics.
Seasaw: Drawn up by academics at the University of California in protest against the wall for ignoring cultural diversity and richness on the border.
Borderwall as Architecture.
Hyperloop: Envisages the creation of 'Otra Nation', a Mexican and U.S. neutral zone with shared infrastructure and a high-speed transportation system known as 'hyperloop' along the border.
MADE Collective.
Sloping bars: Presented by a Minnesota company, it that would be made with steel bars tilted at 30 degrees so it can't easily be climbed and Border Patrol agents can monitor through the fence.
Chanlin Inc.
Sensitive: The wall with extensive sensor systems to detect attempts to intrude both above the building and below the ground.
DarkPulse Technologies.
A musical body: Designers and artists, all women from Pittsburgh, collaborated on a proposal focused more on rejecting the construction of the wall. One design imagines three million hammocks tied to 30-foot trees. Another sketch proposed a semicontinuous wall of almost 10 million organ pipes with openings every 20 feet that would allow people to pass through.
J.M. Design Studio.
The claw: A 30-foot-high concrete wall concept called 'Talon Wall'.
RS1 Holdings Inc.
Zigzag: System of prefabricated panels to form a zig-zag wall.
Hadrian Construction Company.
With or without a view: Designing a company in Forth Worth, Texas, who complained about the federal administration's bidding process.
Penna Gruop.
Pink wall: Designed by architects from Guadalajara, Mexico, as a way of imagining "in all its magnificent perversity" the work of President Trump.
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