Related: 12 Balcony and Rooftop Garden Ideas for Creating a Serene Space A sunk slab, sometimes called a sunken slab, is a layer of concrete built below the floor. Typically, it is used above the ...

Anyone visiting this ancient sunken ground will need goggles and a drysuit to explore it. Reporter Bonnie Silkman takes us to new depths, and it shows us how the underwater world inspires its visitors ...