Visit Old San Juan

Silver-mining city of candy-coloured houses stacked up a ravine, with streets in tunnels and student minstrels serenading the alleys.

Clifftop Spanish fort over San Juan.

The best-preserved Spanish colonial town in Asia — cobbled Calle Crisologo, horse carriages and ancestral houses.

Cobbled colonial old town, UNESCO-listed.

The Pearl of the South: the striped Parque de Bombas firehouse and the best art museum in the Caribbean.

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

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