When I accompanied my husband up to Scotland on his first visit (many, many years ago) he was absolutely enchanted. We visited my sister in Perthshire, then spent several days in Edinburgh. He gazed and gazed at the castle, an also at Arthur's Seat. (He'd never seen even a small hill before)

But I foolishly told him they were both extinct volcanoes.
He was terrified. Every morning when we emerged from our very central hotel he anxiously looked up 'to see if there was any smoke coming out'. And when we visited Dynamic Earth at Holyrood (where they have excellent displays of geology and the early formation of the Earth) he was very frightened, even though I explained that all this happened many millions of years ago.

Outside at Holyrood, of course, one is at the foot of the Crags and Arthur's Seat, and he hurried up the Royal Mile as fast as his legs would carry him. He spent the entire holiday wondering when we'd be engulfed in molten lava!

Nowadays however he's got used to the idea, and is thrilled when the little Dornier aeroplane descends over Edinburgh and he can see these 'dangerous' features from above.