They are some of the world’s all-time greatest building projects. Most have stood the test of time, but with today’s technology, could they be duplicated and done better?

Liz Bonnin joins a scientific team on an expedition across the Galapagos Islands to carry out important research that will help protect the islands and their inhabitants.

Drivers, managers and team owners live life in the fast lane — both on and off the track — during one cutthroat season of Formula 1 racing.

Dian Fossey’s life story from childhood and her early days researching in Congo, through to her arrival in Rwanda, where she spent 18 years studying and protecting the mountain gorilla population. Through extensive and rarely seen archival footage, dozens of Fossey’s letters, interviews with friends and colleagues, and narration by Sigourney Weaver, the event series explores Fossey’s murder and the investigation and trial of her research student Wayne McGuire, who was found guilty in absentia of her murder by the Rwandan courts.

With visitor numbers approaching 70 million every year, Paddington is one of the UK’so busiest transport hubs.

In Humboldt County, California, the big business of legal marijuana brings in visitors from around the world. Some are never seen again.

Insight into the London Ambulance Service, from the highly-pressurised control room to the crews on the streets. Ambulance provides an honest 360-degree snapshot of the daily dilemmas and pressures.

The documentary examines and chronicles the years following the 2011 murder of 12-year-old Garrett Phillips and the subsequent trial of Clarkson University soccer coach Oral “Nick” Hillary.

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Paranormal investigators and ghost-hunting pioneers Jason Hawes, Steve Gonsalves and Dave Tango respond to urgent calls from local paranormal investigators nationwide who have reached a dead end with their high-stakes personal cases.

Griff Rhys Jones explores Africa the unhurried way, as he takes to the continent’s railways to immerse himself in the joy and sometimes the frustration of travelling through a beautiful and beguiling continent, using the most romantic method of transportation. Travelling a total of 7000 miles over five journeys, he explores fascinating landscapes, encounters unforgettable wildlife and meets extraordinary people. Stunning aerial photography combines with observational travelogue to produce a fresh portrait of Africa through Griff’s experiences on and off the train. On each epic trip across five episodes, he discovers how the railway reveals a great deal about the places he travels through. Griff uses the train to get to unexpected places in deserts and forests, villages and cities, learning stories of their past and finding out how they are used today. Griff travels th

Each episode of Hoarders is a fascinating look inside the lives of two different people whose inability to part with their belongings is so out of control that they are on the verge of a personal crisis.