With over 60 per cent of the world’s population living in cities, the networks beneath our feet – which keep the cities above moving – are more important than ever before. Yet we never truly see how these amazing feats of engineering work. Just how deep do the tunnels go? Where do the sewers, bunkers and postal trains run? And, how many tunnels are there under our streets? Each featured city presents a ‘skyline of the underground’ through specially commissioned cut-away illustrations and unique cartography. Drawing on geography, cartography and historical oddities, Mark Ovenden explores what our cities look like from the bottom up.

Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art. Volume 1: Archaeology, Architecture and Art in Underground Construction contains the contributions presented in the eponymous Technical Session during the World Tunnel Congress 2019 (Naples, Italy, 3-9 May 2019). The use of underground space is continuing to grow, due to global urbanization, public demand for efficient transportation, and energy saving, production and distribution. The growing need for space at ground level, along with its continuous value increase and the challenges of energy saving and achieving sustainable development objectives, demand greater and better use of the underground space to ensure that it supports sustainable, resilient and more liveable cities. The contributions cover a wide range of topics, from urban tunnelling under archaeological findings in Naples (Italy) with ground freezing and grouting techniques, via the functional role of heritage in metro projects, to interdisciplinary research in geotechnical engineering and geoarchaeology – a London case study. The book is a valuable reference text for tunnelling specialists, owners, engineers, archaeologists, architects, artists and others involved in underground planning, design and building around the world, and for academics who are interested in underground constructions and geotechnics.

Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art. Volume 7: Long and Deep Tunnels contains the contributions presented in the eponymous Technical Session during the World Tunnel Congress 2019 (Naples, Italy, 3-9 May 2019). The use of underground space is continuing to grow, due to global urbanization, public demand for efficient transportation, and energy saving, production and distribution. The growing need for space at ground level, along with its continuous value increase and the challenges of energy saving and achieving sustainable development objectives, demand greater and better use of the underground space to ensure that it supports sustainable, resilient and more liveable cities. The contributions cover a wide range of topics, from studying tunnels in squeezing ground conditions, via case studies on the Brenner Base Tunnel, the second Gotthard Tunnel, CERN (HL-LHCand the Dubai Strategic Sewerage Tunnel, to TBM steering difficulties. The book is a valuable reference text for tunnelling specialists, owners, engineers, archaeologists, architects, artists and others involved in underground planning, design and building around the world, and for academics who are interested in underground constructions and geotechnics.

In Subterranean Twin Cities, geologist, historian, and urban speleologist Greg Brick takes us on an adventurous, educational, and-thankfully-sanitary journey beneath the streets and into the myriad tunnels, caves, and industrial spaces that make up the Twin Cities' fascinating and surprisingly vast underground landscape. In this groundbreaking tour, the first of its kind of the Twin Cities, Brick mines the stories that lie below the city surface.

Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art contains the contributions presented at the World Tunnel Congress 2019 (Naples, Italy, 3-9 May 2019). The use of underground space is continuing to grow, due to global urbanization, public demand for efficient transportation, and energy saving, production and distribution. The growing need for space at ground level, along with its continuous value increase and the challenges of energy saving and achieving sustainable development objectives, demand greater and better use of the underground space to ensure that it supports sustainable, resilient and more liveable cities. This vision was the source of inspiration for the design of the logos of both the International (ITA) and Italian (SIG) Tunnelling Association. By placing key infrastructures underground – the black circle in the logos – it will be possible to preserve and enhance the quality of the space at ground level – the green line. In order to consider and value underground space usage together with human and social needs, engineers, architects, and artists will have to learn to collaborate and develop an interdisciplinary design approach that addresses functionality, safety, aesthetics and quality of life, and adaptability to future and varied functions. The 700 contributions cover a wide range of topics, from more traditional subjects connected to technical challenges of design and construction of underground works, with emphasis on innovation in tunneling engineering, to less conventional and archetypically Italian themes such as archaeology, architecture, and art. The book has the following main themes: Archaeology, Architecture and Art in underground construction; Environment sustainability in underground construction; Geological and geotechnical knowledge and requirements for project implementation; Ground improvement in underground constructions; Innovation in underground engineering, materials and equipment; Long and deep tunnels; Public communication and awareness; Risk management, contracts and financial aspects; Safety in underground construction; Strategic use of underground space for resilient cities; Urban tunnels. Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art is a valuable reference text for tunneling specialists, owners, engineers, architects and others involved in underground planning, design and building around the world, and for academics who are interested in underground constructions and geotechnics.

Go behind the scenes into little-known corners of the public record and discover how corporate America has worked hand-in-glove with the Pentagon for decades -- dreaming about, planning, and actually constructing secret underground bases. And newly-uncovered information indicates that the strangeness continues with bizarre, high-tech gadgets like portable, hand-held surgical lasers and injectable electronic IDs as small as a grain of rice!

In 1801 Elias Hasket Derby Jr. leaves his two-year retirement. His father, the country's first millionaire, has left him a money pit that many would consider one of the nation's first American Castles. The expense to keep up this mansion and his leisurely lifestyle has forced Elias back into action. He will take command of the local militia to fill in the ponds in the Common as part of an elaborate plot. The plot would entail the beautification of this neighborhood and entice a series of merchants and ship captains to build a series of two grand brick mansions set apart at fixed distances around the new park. All attached to a series of smuggling tunnels that would lead from the wharf, to their stores, and the banks.An elaborate scheme filled with Masons, pirates, a Secretary of the Navy, Senators, Representatives, a Supreme Court Justice, Presidents, and a touch of murder! Dig into the tunnels of Salem and find the underbelly of our nation!