One of the largest underground systems runs under Canada's largest urban center.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The final resting place of New Orleans' most famous voodoo priestess.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The Greek War of Independence was declared at this medieval Byzantine sanctuary.