Tobermory is a colorful settlement on the Isle of Mull, known for being featured on the children's TV show Balamory. The Samson and Goliath cranes in Belfast dominate the skyline and are landmarks from the shipbuilding industry, in particular being used to construct the Titanic. Chapelcross nuclear power plant near Annan produced plutonium for weapons as well as power, and its cooling towers were demolished in 2007 after closing in 2004 with decommissioning expected to take 100 years.

1. What on Earth? UNITED KINGDOM 1

2. Tobermory is the largest settlement on Mull with a population of around 700. Many of its buildings, mostly shops and restaurants, are painted in assorted bright colours, making it a popular location for television programmes, including the children's show Balamory . TOBERMORY, MULL, ARGYLL and BUTE

3. Samson and Goliath are twin shipbuilding gantry cranes that dominate the Belfast skyline and are landmark structures of the city. The cranes are situated in the shipyard of Harland & Wolff, builders of the Titanic . The cranes were constructed by the German engineering firm Krupp, in 1969 and 1974. At its height Harland & Wolff has 35,000 employees but the last ship was launched in 2003, although the cranes have now been scheduled as historic monuments. SAMSON and GOLIATH, BELFAST

4. Chapelcross was a Magnox nuclear power plant near the town of Annan. Its main function was to produce weapons-grade plutonium for the UK's nuclear weapon programme, but it also generated electrical power on a commercial basis. Chapelcross closed in 2004 and ‘decommissioning’ is expected to take around 100 years. The four landmark concrete cooling towers were demolished with explosives in 2007. CHAPELCROSS NUCLEAR POWER STATION, DUMFRIES and GALLOWAY

5. The Middlesbrough Transporter Bridge , built in 1911, is the furthest downstream bridge across the River Tees. It is a transporter bridge, carrying a travelling 'car' or 'gondola' suspended from the bridge, across the river in 90 seconds. The car can carry 200 people and 9 cars. TRANSPORTER BRIDGE, MIDDLESBROUGH, NORTH YORKSHIRE

6. The Falkirk Wheel is a rotating boat lift connecting the Forth and Clyde Canal with the Union Canal. The difference in the levels of the two canals at the wheel is 24 metres, roughly equivalent to the height of an eight storey building. Queen Elizabeth II opened the Falkirk Wheel in 2002 as part of her Golden Jubilee celebrations. The opening had been delayed by a month due to flooding caused by vandals who forced open the Wheel's gates. FALKIRK WHEEL

7. Longleat is an English country estate, currently the seat of the Marquesses of Bath. It was the first stately home to open to the public and has a number of tourist attractions including a Safari park. Longleat’s hedge maze was first laid out in 1975 and is made up of more than 16,000 English yews with a total pathway length of 1.69 miles. The average time to complete the maze is 90 minutes. LONGLEAT MAZE, WILTSHIRE

8. Stonehenge is One of the most famous prehistoric sites in the world. It is composed of earthworks surrounding a circular setting of large standing stones. Archaeologists believe the standing stones were erected around 3200 BC. The site and its surroundings were added to the UNESCO list of World Heritage Sites in 1986 in a co-listing with Avebury henge monument. STONEHENGE, WILTSHIRE

9. The Clifton Suspension Bridge is a suspension bridge, spanning the Avon Gorge and linking Clifton in Bristol to Leigh Woods in North Somerset. Designed by Isambard Kingdom Brunel, it is a distinctive landmark that is used as a symbol of Bristol. CLIFTON SUSPENSION BRIDGE, BRISTOL

10. Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides. Its size and naturally arched roof, and the eerie sounds produced by the echoes of waves, inspired classical composer Felix Mendelssohn, who visited in 1829, to write his Fingal's Cave Opus . The cave became known by its popular name, although its Gaelic name is Uamh-Binn , meaning "cave of melody". [ FINGAL’S CAVE, STAFFA, ARGYLL and BUTE

11. Angel of the North is a modern sculpture created by Antony Gormley, standing on a hill overlooking the A1 and A167 roads into Tyneside and the East Coast Main Line rail route. It is a steel sculpture of an angel, 20 metres tall, with wings 54 metres wide. Construction work was completed in 1998. Originally it caused some controversy but has now come to be considered as a landmark for the North East of England. It is sometimes referred to affectionately as "The Gateshead Flasher”. ANGEL OF THE NORTH, GATESHEAD, TYNE and WEAR

12. The Uffington White Horse is a highly stylised hill figure, 110 m long, cut out of the turf on the upper slopes of Uffington Castle, an Iron Age hill fort near The Ridgeway. The figure has been shown to date back some 3,000 years, to the Bronze Age. It has long been debated whether the chalk figure is intended to represent a horse or some other animal. However, it has been called a horse since the eleventh century at least. UFFINGTON WHITE HORSE, OXFORDSHIRE

13. Crop circle is a term used to describe geometrical formations of flattened crops first observed in England in the late 1970s. Crop circle enthusiasts, soon offered various paranormal explanations for the phenomenon, but in 1991 two men from Southampton announced that they had conceived the idea as a prank and had made their crop circles using planks, rope and wire as their only tools. CROP CIRCLE, WILTSHIRE

14. Early examples of crop circles were usually simple circular patterns of various sizes. But after some years, more and more elaborate and complex geometric patterns emerged. After the public admission of the original creators, crop circle activity skyrocketed. Each new design sought to be more complex than earlier designs. Today crop circle designs have increased in complexity to the point where they have become an art form in and of themselves. SILBURY HILL CROP CIRCLE, WILTSHIRE

15. The Clyde Auditorium , familiarly known as " The Armadillo ", is a concert and public event venue in Glasgow. The building sits on the site of the Queen's Dock of the River Clyde, adjacent to the Scottish Exhibition and Conference Centre. The 3,000 seat venue was completed in 1997 and has quickly become one of the most recognisable on Clydeside and one of the images most associated with modern Glasgow. CLYDE AUDITORIUM, GLASGOW

16. The Eden Project is a large-scale environmental complex located in a recycled china clay pit which has quickly become one of the most popular visitor attractions in the United Kingdom. At the bottom of the pit are two covered biomes:The Humid Tropics Biome, which is the largest greenhouse in the world, and The Warm Temperate Biome. The complex opened in 2001. EDEN PROJECT, CORNWALL

17. The M6 motorway is the longest motorway in the UK. It runs from a junction with the M1 near Rugby in central England to north of Carlisle, close to the Scottish border. In 2006 the Government finally approved the extension of the M6 for 6 miles (the so-called "Cumberland Gap") to link into the existing A74(M) at a cost of £174 million. CATTLE CROSSING THE M6, CUMBRIA

18. The Heart of Midlothian is a heart-shaped mosaic built into the pavement near the West Door of St Giles Cathedral on the Royal Mile (the High Street section). It records the position of the 15th Century Tolbooth of Edinburgh which was the administrative centre of the town, prison and one of several sites of public execution. It is a local custom to spit on the heart, although the reason is disputed. HEART of MIDLOTHIAN, EDINBURGH

19. The Magic Roundabout in Swindon, was constructed in 1972 and consists of one large roundabout containing five mini-roundabouts. Traffic flow around the larger, inner roundabout is actually anti/-clockwise, whereas traffic flows in the usual clockwise manner around the five mini-roundabouts and the outer loop. MAGIC ROUNDABOUT, SWINDON, WILTSHIRE

20. Our Dynamic Earth is a Scottish science centre and prominent conference venue and visitor attraction located in Holyrood, Edinburgh, beside the Scottish Parliament Building. The centre opened in 1999 as one of the first major projects supported by the UK's Millennium Commission. The project was the centrepiece of an urban regeneration plan for the former industrial land at the lower end of the Royal Mile and is housed within a distinctive landmark building, OUR DYNAMIC EARTH, EDINBURGH

21. The West Pier in Brighton was built in 1866 but has been closed and deteriorating since 1975, awaiting renovation. In 2002 part of the pier collapsed and the following year much of what was left was destroyed in a fire. A new plan to restore the pier has been proposed and work is due to commence in 2007. WEST PIER, BRIGHTON, EAST SUSSEX

22. 02 Tobermory 03 Belfast Samson and Goliath 04 Chapelcross 05 Middlesbrough Transporter Bridge 06 Falkirk Wheel 07 Longleat Maze 08 Stonehenge 09 Bristol Clifton Suspension Bridge 10 Staffa Fingal’s Cave 11 Gateshead Angel of the North 12 Uffington White Horse 13 Wiltshire crop circle 14 Wiltshire crop circle 15 Glasgow Armadillo 16 Cornwall Eden Project 17 Cumbria M6 18 Edinburgh Heart of Midlothian 19 Swindon Magic Roundabout 20 Edinburgh Our Dynamic Earth 21 Brighton West Pier