Here are a few links to relevant sites:

BBC Wales - Iron Age Celts

A light-hearted interactive history of the

Celts for children of all ages, includes animated stories and games. 

Brigantia Iron Age Celtic Group

A historical re-enactment society dedicated

to the Pagan Tribes of Britain.

Butser Ancient Farm, UK

World famous site founded by

Dr P J Reynolds.

Castell Henllys

An Iron Age village in Wales, UK.

Celtic Heritage Magazine-Nova Scotia

Promotes the modern Celtic heritage of Eastern Canada.  It is published in Canada

6 times yearly by Clansman Publishing Ltd.

Chiltern Open Air Museum - UK

Where multi-period buildings come alive through history.

Ermine Street Guard

Since its formation in 1972 the Guard has become firmly established as the leading society making such a detailed and accurate study of the Roman world.
 

Familia Gladiatoria

On of the original gladiator re-enactment groups from Hungary established in 1986.

Fortress of Louisburg National Historic Site of Canada

The largest reconstructed 18th-century French fortified town in North America.

Halifax Citadel National Historic Site of Canada

Commemorated as a nationally significant symbol of Halifax's role as a principal naval station in the British Empire and of the city's importance to Canada's development and evolution from colony to nation.

Heuneburg Museum- Germany

A hike through History:  From the Museum

to the Heuneburg and the reconstructed "princely" burial mounds.

Highland Village Museum

A living  history museum and cultural centre that celebrates the Gaelic experience in Nova Scotia.

Jake Powning - Swordsmith

Jake Powning, master swordsmith in New Brunswick who creates incredible works

of art.

Kelticos

Forum of Iron Age Studies and Prehistoric Europe.

Kings Landing Historical Village

A historic recreation of 19th century Loyalists.

LEGIO XXX Canada

Legio XXX Ulpia Victrix is a Roman reenactment group with members in Southern Ontario and Indiana

Les Ambiani

Gaulish re-enactment group based in French.

Les Gaulois

Gaulish re-enactment group based in France.

Les Leuki

French Archaeological Research Group.

Litus Roma Hostel

The first hostel by the sea in Rome.

Matthew Amt's XXth Legion home page

For the reenactor, living historian, or reconstructionist with too much spare time and money.

Pirates Cave

Historical costumes for the perfect costume party.

Portable Antiquities Scheme's Finds Database

A searchable database of objects ranging from the Palaeolithic to around the 18th Century, including hundreds of Celtic and Roman artifacts.

Robert Hurford- Chariot Maker

Celtic chariot reconstruction.

Roman Military Research Society

UK group specialising in recreating the Roman Army

and Roman life during the latter part of the first

century A.D.

Simon James's Ancient Celts

The outline presented here is obviously a vast oversimplification, but there is now also reason to think that the whole basis of the story may be unsatisfactory, as is explained in an alternative history of "Celticness"

The Peat Moors Centre-Somerset-UK

Travel back in time to prehistoric Somerset and

discover first hand how our Celtic ancestors made

their homes in the centre of an extensive wetland.

Tourism New Brunswick

Province of New Brunswick tourism Site.

Udo Grebe Gamedesign

Roman and other historical board games from

Europe.

Village de l'Acadien

An historic village portraying the lives of Acadians between 1770 and 1939.