Sigtuna municipality, Sigtuna kommun, 30-40 km north of Stockholm, contains Sigtuna, Sweden's oldest city, the modern town Märsta, and Stockholm-Arlanda Airport, Sweden's largest airport, as well as several archaeological sites.
The area prospered during the Viking Age, leaving a heritage of runestones, graves and monuments, while Lake Mälaren was part of the Baltic Sea. Sigtuna was founded just before AD 1000, as Christianity arrived, and Sweden was united as a single kingdom. With a royal mint and a bishop, Sigtuna was effectively the capital of Sweden until power shifted towards Stockholm and Uppsala in the 13th century. After three fires in the 17th century, Sigtuna was a ghost town for 250 years, revived in the 1910s as a nationalist project.
The Arlanda airport opened in 1960, and has expanded step by step. Märsta, at the railroad between Stockholm and Uppsala, grew side by side with the airport.
- Stockholm-Arlanda Airport: See Stockholm#By plane for transfer between Stockholm and Arlanda.
- Sigtuna is part of Stockholm's public transport network.  The Stockholm commuter train stops at Rosersberg and Märsta.
- Car rental:  Avis, Europcar and Hertz have car rentals at Arlanda, as well as local companies Budget and Sixt.
- Strömma has a tourist ferry-line between Stockholm and Sigtuna.
If you touch down at Arlanda, and you want a chronological approach to Sweden, you could rent a car at the airport, or take a local bus, and start exploring Sigtuna, going on to Uppsala or Stockholm.
- Runestones and other artifacts from the Viking Age
Hiking, cycling and bathing during summer. Ice-skating and Nordic skiing during winter.
Christmas fairs in Sigtuna.
- Jumbostay, Jumbovägen 4 near Arlanda Airport,  is a bit of a novelty and conveniently located near the airport. An old Boeing 747 Jumbo jet converted into a backpackers hostel. Everything inside is new and clean, and linen comes included on made beds. Flat screen TV's in each room are a luxury for hostels, and if you really want to splash out, there is the cockpit suite. On the downside, not much of an atmosphere once you get over the novelty of staying in a jet.
- Ibis Hotel,  a comparably cheap hotel.
- Radisson Blu, , the only hotel within the airport terminal.
- Clarion Arlanda, , an up-market hotel opened in 2012.
- Rosersberg Palace : A Baroque palace built at the height of the Swedish Empire.
Beware of pickpocketing at Arlanda Airport.