Taxila Introduction

Taxila is an important archaelogical site in Pakistan containing the ruins of the Gandhāran city and university of Takshashila (also Takkasila or Taxila) an important Vedic/Hindu and Buddhist centre of learning from the 5th century BCE to the 2nd century CE. In 1980, Taxila was declared a UNESCO World Heritage Site with multiple locations.
Historically, Taxila lay at the crossroads of three major trade routes: the royal highway from Pāṭaliputra; the north-western route through Bactria, Kāpiśa, and Peshawar and the route from Kashmir and Central Asia, via Śrinigar, Mānsehrā, and the Haripur valley across the Khunjerab pass to the Silk Road.
Today, Taxila is located in the western region of the Islamabad Capital Territory—to the northwest of Rawalpindi and on the border of the Punjab and North West Frontier Provinces—about 30 kilometres west-northwest of Islamabad, just off the Grand Trunk Road.

(The above information is taken from Wikipedia)