Welcome to Skellig Islands
You'll need to do your best grisly sea-dog impression ('argh!') on the 12km crossing, which can be rough. There are no toilets or shelter on Skellig Michael, the only island that permits visitor landings. Bring something to eat and drink, and wear sturdy shoes with good grip and weatherproof clothing.
The dizzying 180m climb up to the monastery takes in 618 steep stairs. Due to the sheer (and often slippery) terrain and sudden wind gusts, it's not suitable for young children or people with limited mobility.