Visit the Grund old quarter

Cliff-carved tunnel fortifications.

Visit Luxembourg, a small landlocked country in Western Europe. Explore the UNESCO-listed Old Town of Luxembourg City with its fortifications and casemates, see the Grand Ducal Palace (official residence of the Grand Duke), walk across the Pont Adolphe (a stone arch bridge offering views of the Pétrusse Valley), and try local dishes like judd mat gaardebounen (smoked pork with broad beans) or gromperekichelcher (potato fritters).

A whole town of trulli — conical drystone houses found nowhere else, white and strange in the Puglian sun

Restored Romanesque-Gothic castle above the Our river, one of the largest west of the Rhine, with a chairlift to the view.

The world's smallest state holds its biggest art: St Peter's, the Vatican Museums and the Sistine ceiling

Eat your way through Lima, South America's food capital, between colonial plazas and Pacific clifftops

Climb 251 spiralling steps up the world's most famous architectural mistake — tilting since 1173

Explore the ancient temple complex of Angkor Wat, the largest religious monument in the world, located in Cambodia