What to see · Châtillon

The valley's first single-block castle: fourteenth-century windows and old magnetite tunnels above Châtillon.

A 1911 mock castle above the Dora Baltea, now the valley's modern art museum, with a park and an 1888 sequoia.

A mansion hiding one of the valley's oldest castles: frescoes of 1502 and a park open in the warmer months.

A single 1776 arch over the Marmore, above the foundry that cast parts of the Mole Antonelliana.