What started in a garage in Aurora CO Invisible Structures Inc. has grown to be the industrys trusted leader in porous paving and modular underground water containment since 1982. Designed by a Landscape Architect our products provide practical solutions and design versatility to any project. Our products are known for their strength durability and ease of installation. Made from 100 recycled plastic and manufactured in the USA we take pride in our commitment to maintaining the values upon which we were built unparalleled customer service the finest aesthetics available and the highest quality sustainable products for our future.