A proposed memorial arch has received backing from the National Park Service. This arch, standing at 250 feet tall, is expected to alter the historical significance of nearby sites. Dozens of landmarks and monuments may be affected by its construction.

The report highlights potential disruptions to sightlines between iconic landmarks. Further information is available from the National Park Service report, which was released on Friday.

Details of the arch's planned location and its potential impact are outlined in the report, including effects on notable monuments and buildings.