When already in Roslagen, take the chance to see you around. A few tip!
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Take your bike for a great natural countryride thru Furusund to Blidö, Visit Blidö Wärdshus!(Inn)

Blidö Wärdshus(inn) offer for Custom Bike Show visitors, sunday 8/6 a "Blidö package" with a two course dinner, lodging at hostel and breakfast at 490 SEK./person, must be booked in advance. Also possibility to book sauna and sauna barrel.
Or why not book a sailing trip with an old genuine sailing ship from Roslagen.

"Sandkilen Helmi" will be reserved in the first place for participator from Custom Bike Show at 8/6.

Travel instructions: From Norrtälje, road 276 towards Åkersberga. Take left at Penningby towards Furusund, road 278.
The most beautiful road in Roslagen.
You travel past six islands and two car ferries to arrive at Blidö.
Well on Blidö, follow the road southwards, approx. 2,5 km and turn right at a roadsign "Blidö Wärdshus".
HITTA.se

A visit at the Vikings of Storholmen may interest.

In the Viking village of  Storholmen you will receive a historical experience, regardless of age. Upon entering the village you are greeted by the ringing sound of the blacksmiths hammer, the echo of clashing swords in the distance, as well as the scent of smoke, tar and freshly baked bread. Here you will encounter exciting people and Vikings, from the east as well as the west, teaching you about the ancient handicrafts, and telling you about the ancient days.

Travel instructions: From Norrtälje road 76 northward. Just before the tiny village Svanberga, 10 km north Norrtälje. You will see a rune stone at left side. 
At right side of the road is a roadsign says "Vikingaby".