The "Big Tree" in Goose Island State Park

the Big Tree originally uploaded by Broken Piggy Bank

The "Big Tree" at Goose Island State Park was named the State Champion Coastal Live Oak (Quercus virginiana) in 1969, and is thought to be one of the largest in the nation.

Trunk Circumference: 35 feet 1 and 3/4 inches or 10.71 meters
Average Trunk Diameter: 11 feet 2 and 1/4 inch or 3.41 meters
Crown Spread: 89 feet or 27.1 meters
Height: 44 feet or 13.4 meters
Age: In excess of 1,000 years

info found in...
http://www.tpwd.state.tx.us/spdest/findadest/parks/goose_island/big_tree.phtml

Old oak tree at Rufford Hall

THE old oak tree, originally uploaded by pojka2.

This old oak tree in it full autumn colors is located at Rufford Hall in Nottinghamshire. It is an English Oak (also called Pedunculate Oak) which is the species Quercus robur.

Large Holm Oak - Una Gran Encina

Via Verde: Puerto Serrano - Olvera, originally uploaded by Grupo de Montaña PiedraLuenga.

This large Holm Oak (Encina in Spanish) is located along a popular mountain bike route that is in fact the trajectory of an old set of train tracks that has been converted into a "Via Verde" (a green path). This particular stretch runs from Puerto Serrano to Olvera. This large Holm oak makes for a nice resting area for the bikers.

Angel Oak Tree

Ancient Tree Of Time, originally uploaded by MarkReqs.

The Angel Oak is a Southern live oak tree located in Angel Oak Park, in Charleston, South Carolina on Johns Island, one of South Carolina's Sea Islands. It is estimated to be over 1400 years old, standing 20 m (65 feet) tall, 2.47 m in diameter, and the crown covers an area of 1,580 m² (17,000 square feet). Its longest limb is 27 m (89 feet) in length. The tree and surrounding park have been owned by the city of Charleston since 1991.