Watch as we handcraft a one-of-a-kind secret underwater house, complete with a hidden underground passage, using only ...

An curved arrow pointing right. Steve Humble dreamed of filling his giant house with secret passageways, but when he looked for a company to build them, he couldn't find one. So he started a ...

The church, constructed by Francesco, served as the family’s burial site and of course, houses Leonardo’s ... and ideas for further studies on secret passages,” said Francesca Biolo, one ...