Georgetown is Guyana's capital and largest city located on Atlantic coast. Known as "Garden City of the Caribbean" for its British colonial architecture. Population was 118,363 in 2012, down from 134,497 in 2002
Trench is a deep excavation narrower than its length. Created by erosion or tectonic plate movement. Used for underground utilities installation and construction. Archaeological trench method excavates ancient ruins. Geotechnical engineering locates faults and soil properties
Colombo is Sri Lanka's largest city with 642,163 inhabitants. Serves as executive and judicial capital since 1815. Metropolitan area has 5.6 million people. Financial centre and major tourist destination
Connects Ortaköy (Europe) and Beylerbeyi (Asia) across Bosphorus strait. Completed in 1973, spans 1,560m with 1,074m main span. World's fourth-longest suspension bridge at completion. Cost US$200 million ($1.37 billion in 2023)
First permanent water wells appeared around 8500 BCE in Cyprus. Ancient Mesopotamians introduced clay sewer pipes around 4000 BCE. Indus Valley civilization developed world's first urban sanitation systems. Minoan civilization built advanced underground clay pipes for sanitation
Storm drains collect rainwater from impervious surfaces like streets and roofs. Systems range from small residential wells to large municipal systems. Drains receive water from street gutters and rain gutters from buildings