The Roman Baths complex is a site of historical interest in the city of Bath. The complex is a very well-preserved Roman site of public bathing, and is a major tourist attraction. The buildings, the upper portions of which date to the 18th century, are grade 1 listed. The water which bubbles up from the ground at Bath today, fell as rain on the Mendip Hills many hundreds, or possibly thousands, of years ago. It percolates down through limestone aquifers to a depth of between 2,700 and 4,300 metres where geothermal energy raises the water temperature to between 64 and 96 degrees centigrade.

The Clifton Suspension Bridge spans the Avon Gorge and linking Clifton to Leigh Woods. Designed by Isambard Kingdom Brunel, it is a distinctive landmark used as a symbol of Bristol. The idea of building the bridge originated in 1754, with a bequest in the will of Bristolian merchant William Vick, who left £1,000 invested with instructions that when the interest had accumulated to £10,000, it should be used for the purpose of building a stone bridge. The towers from which the bridge is suspended are not completely identical in construction, although they are generally similar in size.

Cadbury Castle is an Iron Age hill fort in the civil parish of South Cadbury. It is famously associated with King Arthur. It stands on the summit of Cadbury Hill, a limestone hill situated on the southern edge of the Somerset Levels, with flat lowland to the north. The summit is 150 metres above sea-level. The hill is surrounded by four terraced earthwork banks and ditches and a stand of trees. The castle is a multivallate hill fort built around 500 bc. Large ramparts and elaborate timber defences were constructed and refortified at least five times over the following centuries.

A major tourist attraction for over 200 years, Cheddar's cathedral-like caves and Britain's biggest Gorge is also the site of the discovery of the country's oldest complete human skeleton. Discovered in 1903, "Cheddar Man" was buried in Gough's Cave 9,000 years ago. Gough's Cave, discovered in 1890, is one of the two main caves of the "Cheddar Complex" open to the public; the other being Cox's Cave, which is much smaller; both being named after their discoverers. The Gorge's many caves are also home to colonies of Greater and Lesser Horseshoe bats. Authentic Cheddar cheese is made in the lower part of the Gorge.