An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

Eclectic final resting place of the controversial explorer.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

400-year-old garden, restored to beauty.