Aland Islands Travel Guide: History, Sights & Staying Connected

By Elina Sundqvist, Nordic Travel Writer — last updated April 2025. This Aland Islands travel guide covers the archipelago sitting quietly between Sweden and Finland, though its small size shouldn't fool you. Home to over 6,700 islands, Aland has Viking settlements, Russian fortresses, and hard-won autonomy that makes it unlike anywhere else in the Nordic world. I spent a week cycling between ruins and coastal villages here, and this guide reflects what actually worked on the ground—not just what's in the brochures.

This guide walks you through the must-see historical sites, practical travel tips, and how to keep your phone connected without paying painful roaming fees while you explore. If you're new to eSIM technology in general, our What Is an eSIM and How Does It Work? guide covers the basics before you land.

Aland Islands Travel Guide: A Brief History

People have lived on these islands since the Stone Age, but it was the Vikings who really put Aland on the map. Sailors used the archipelago as a stopover between Sweden and lands further east, and traces of that era still show up in burial mounds and old trading posts scattered across the islands.

Later, Aland became a strategic prize. Russia built the massive Bomarsund fortress here in the 1830s, only to see it destroyed by British and French forces during the Crimean War in 1854. After World War I, both Sweden and Finland claimed the islands, and the League of Nations stepped in with a 1921 compromise: Aland would belong to Finland but keep its own parliament, its Swedish language, and demilitarized status. That decision still shapes daily life today. (Source: Visit Aland — History of Aland)

Top Historical Places to Visit

• Bomarsund Fortress Ruins — Free, open-air site roughly 25km from Mariehamn; the crumbling stone walls mark a Baltic stronghold destroyed before it was ever finished.
• Kastelholm Castle — Dating to the 1380s, this former royal seat charges around €8 for a guided tour through restored rooms and dungeons (summer hours only, roughly 10am–5pm).
• Jan Karlsgården Open-Air Museum — Right next to Kastelholm, entry is free and recreates a traditional Aland farming village with period buildings and animals.
• Aland Maritime Museum — In Mariehamn, tickets run about €12 and include access to the tall ship Pommern docked outside, once part of one of the world's largest commercial sailing fleets.

Getting Around the Aland Islands

Mariehamn, the capital, is your natural home base. From there, the ferry operators Alandstrafiken (inter-island public ferries, often free or low-cost for cars) and Viking Line/Eckerö Line (mainland connections) link you to smaller islands. Cycling is one of the best ways to explore thanks to flat terrain—Mariehamn to Bomarsund is about 25km one-way, and Mariehamn to Kastelholm is closer to 20km, both manageable in a half-day ride on well-marked paths. If you're short on time, renting a car gives you flexibility to reach remote sites without waiting on ferry schedules.

Summer is peak season, with long daylight hours perfect for exploring ruins and coastal villages. Spring and early autumn offer quieter crowds and still-pleasant weather for walking tours.

Staying Connected on the Aland Islands

Because the Aland Islands are part of Finland but have their own regional identity, mobile coverage can behave a little differently than the mainland, and traditional roaming charges can add up fast for international travelers. An eSIM is a simple fix. You can set it up before you even leave home, and it activates the moment you land, so you're not scrambling for Wi-Fi at the ferry terminal or fortress parking lot.

This is where GotoeSIM genuinely makes travel easier. Instead of hunting for a local SIM shop or dealing with unlocking issues, you get instant eSIM delivery straight to your phone, with a one-tap install that takes just a couple of minutes. GotoeSIM covers over 190 countries, with plans starting from just $0.42, and if you end up not using an eSIM, refunds are available on unused plans—so there's little downside to grabbing one ahead of your trip.

For the Aland Islands specifically, a few affordable options make sense depending on your trip length: the Aland Islands 500MB/Day plan at $0.98 works well for light browsing and maps, the Aland Islands 1GB/Day plan at $1.79 is a solid pick if you're sharing photos and using navigation heavily, and the Aland Islands 1GB 7Days plan at $1.89 is a great budget-friendly choice for a full week of island-hopping without daily top-ups. You can compare all current options and pick what fits your itinerary at gotoesim.com/plans.

Final Tips Before You Go

• Pack layers—Baltic weather shifts quickly, even in summer.
• Book ferries in advance during July and August, the busiest travel months.
• Bring a bike lock if you plan to cycle between historical sites.
• Set up your eSIM before departure so you land already connected.

FAQ

Do I need a visa to visit the Aland Islands?

Since the Aland Islands are part of Finland, the same Schengen visa rules apply. Most travelers from the US, UK, EU, and many other countries can visit visa-free for short stays.

What language do people speak in the Aland Islands?

Swedish is the official language, unlike mainland Finland where Finnish dominates. Many locals also speak English, especially in tourist areas and Mariehamn.

Will my regular SIM card work on the Aland Islands?

It depends on your carrier's roaming agreements, and international roaming fees can be steep. An eSIM, like the Aland Islands plans available through GotoeSIM, is often a cheaper and more reliable alternative for visitors.

What is the best time to visit the Aland Islands?

June through August offers the longest daylight hours and full ferry schedules, ideal for cycling and visiting outdoor historical sites. Late May and September bring smaller crowds and mild weather, though some museums shift to reduced hours.

How do I reach the Aland Islands?

Most travelers arrive by ferry from Stockholm, Sweden, or Turku/Helsinki, Finland, via operators like Viking Line or Eckerö Line, with crossings taking roughly 5-6 hours. There's also a small airport in Mariehamn with limited flights from Stockholm and Helsinki for a faster option.