Helpful staff, easy to find location, clean rooms -- Ostello di Corniglia is not quaint and cozy the way some apartments of the Cinque Terre may be, but for a hostel it's perfect.
It's right in the center of town with a great location. Just follow the path/main road and you can't miss it next to the post office and municipal buildings, steps from the square. Like everywhere in the Cinque Terre, the views are great. You can't see the ocean (as from most places in Corniglia) but you can see the pastoral hillside and town.
Corniglia is a very tiny but cute town. It's on a hilltop, unlike the other towns that cascade down to water level. There are only a few "streets" winding around. You'll probably feel lost, but it's so small that you pop out again eventually. There are a lot of great hidden restaurants and cute shops. The road up from the train station is long and steep. You can pay to take the green shuttle instead. If your luggage is easy to carry, the steps at the end of the train station are the best way to get up to the town.
Rooms and Bathrooms
The place is modern and clean, with very high ceilings and big, curtained windows. You get bunk beds and each one is equipped with a nightlight and outlet. You also are assigned a huge locker and they give you the key, so no need to fit your own lock. You have to make your own bed, but the sheets are impeccable and you get a large (although thin and not absorbent) towel as well as a hand towel. All of this at no extra charge!
The bathrooms are large, bright, and clean; there are two enclosed toilet stalls with sinks. Then in the main bathroom area there are two sinks and two showers.
The lobby is modern and well-lit. There are places to sit and hang out. The staff speak English and can tell you all about the hiking trails, and they have maps and train schedules. The hostel offers breakfast at low cost; you must reserve the night before. There are also cafes in town if you need something different.
They have a washer and dryer, which can be crucial if you're hiking and sweaty. The hostel closes in the afternoon, so make sure you check the hours because it will be locked and you can't get in. Also there is some rule against luggage storage in the Cinque Terre, so plan out your hiking carefully.
This hostel is clean, modern, and safe and its location is central. It's great for an overnight in the center city of the Cinque Terre.