Athens

Athens is the only city in the world where the ancient ruins outrank everything else – and everyone knows it, including the Athenians. There is the city that looks down from above: the Parthenon, the Theatre of Dionysus, ruins catching gold light at dusk while crowds queue below. And there is the city at street level, where Monastiraki's market spills over with herbs and worry beads, and Psirri's backstreets hold restaurants you'd never find without a local.

The risk is spending your visit entirely in the vertical – neck craned toward the Acropolis, then returning to the hotel with sore feet and a postcard you could have bought at the airport.

VoiceMap's self-guided audio tours work at both levels. One guide walks you through the Ancient Agora where Socrates argued and democracy took shape; another takes you into the neoclassical boulevards a newly independent Greece built to announce itself to Europe, or leads you hungry through Varvakios market and the spice shops of Evripidou Street. Put your earbuds in. Kalimera, Athens.