United Kingdom

Pontcysyllte Aqueduct and Canal

A 19th-century engineering achievement; an elegant structure that still functions to carry a canal high above the ground.

Location where radio astronomy was developed, leading to a host of new discoveries about the universe.

Towns in seven countries where an early tourism industry thrived around natural hot springs.

Two mysterious prehistoric stone circles: one, the most sophisticated in the world; the other, the largest.

Famous Georgian-period spa town with surviving elements from its Roman-period history as well.

A historic castle used as palace, fortress and prison since the days of William the Conquerer.

Three famous London buildings that represent the “intertwined history of church, monarchy and state.”

A region visibly shaped by its long-standing slate quarry industry.

A breathtakingly beautiful landscape of mountains, lakes and agriculture.

A coastline with 185 million years of interesting rock formations, invaluable for our understanding of geology and related sciences.

An area of seaside cliffs comprising polygonal stone columns that seemingly form a “pavement.”

A series of early cotton mills that represent the birth of the factory system at the start of the Industrial Revolution.

A beautifully-landscaped Georgian garden and a well-preserved medieval monastic ruin.

Four castles in Wales, fine examples of medieval defensive architecture, all built under orders of King Edward I.

A medieval Old Town and a neoclassical New Town that harmonize beautifully and that influenced European urban planning.

An isolated island of dramatic landscapes: a nature sanctuary, with ample evidence of human fortitude in such a remote spot.

Remains of a neolithic society that predates Stonehenge and the pyramids of Giza.