Catania is built for arriving alone: the grid of black lava streets crosses end to end in 20 minutes, standing-counter food means no table for one, and the hostel rooftops and Via Santa Filomena bars fill with people doing exactly the same thing.
Catania's best-known hostel occupies a 17th-century palazzo 80m from Piazza Duomo, with a rooftop bar open to non-guests from 18:00. Dorms from €25, private doubles €60. Communal kitchen and 8-bed rooms make solo arrivals painless.
A standing-counter fish fry under the arcade at the edge of La Pescheria where you order by pointing. Fried calamari, gambero rosso and polpo cones run €5-12, eaten at shared marble ledges. Open 12:00-15:00 and 19:00-23:00, closed Sunday.
Europe's second-largest Benedictine monastery, now the university humanities faculty, is enterable only on the Officine Culturali guided tour (€8, roughly hourly 10:00-17:00). English departures run daily and the 15-person groups mix travellers with Catanese students.
A book-lined bar on a quiet lane behind Via Etnea where the counter is the main seating, so drinking alone reads as normal rather than odd. Etna Rosso by the glass €5-7, cheese and salumi board €12, open until 01:00.
A three-hour walking tour leaving Piazza Università with groups capped around 12, covering cipollina, arancino, horse-meat sandwiches and Nerello Mascalese across five family-run stops. €49 covers every tasting and drink.
The pioneer of Via Santa Filomena's restaurant strip spells its menu phonetically in dialect ('ciysbrghr') and seats everyone at long shared benches under the pergola. Burgers €8-13, Nero d'Avola €4 a glass, kitchen open continuously.
A cove of black lava shingle below Via Messina where fishing boats are winched onto the basalt, 20 minutes north of the centre on bus 534. Entry free, sunbed hire about €10, and the flat rock slabs are where Catanese students spend afternoons.
A former warehouse courtyard off Via Vittorio Emanuele rebuilt as a cluster of bars, a bookshop and an open stage. Live sets most evenings from 19:00, spritz around €5, and the standing crowd spreads across the yard so joining a table is expected.
A 2nd-century AD theatre for 7,000 spectators half-buried beneath the houses of Via Vittorio Emanuele, with the smaller Odeon rehearsal hall behind it. €6 entry, open 09:00-19:00, and rarely more than a dozen visitors in the vaulted corridors.
The daily open-air market spreads across Piazza Carlo Alberto selling ricotta, capers, secondhand denim and household junk, packing up around 14:00. Stalls at the Via Pacini end grill sausage panini for about €3.50 to eat standing.
Frederick II's 1239 lava-block fortress once stood on the shoreline until the 1669 eruption pushed the sea half a kilometre away. Inside, the Museo Civico holds the Biscari classical collection; €10, open 09:00-19:00 Tuesday to Sunday.
An eighth-floor terrace on Via Etnea that looks straight up the boulevard to Etna's summit, catching alpenglow on the snowline around sunset. Cocktails €12, no minimum spend, and the bar counter seats single drinkers facing the volcano.