A beautiful deserted greenhouse in the middle of a park.

Giant fake rocks that shielded Bond lie in wait for their next action scene.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

This whimsical fountain pays tribute to Toronto's four-legged friends.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

This Toronto garden collects stares and tchotchkes in equal measure.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A historic estate packed with George Washington's heirlooms, and its own nuclear bunker.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A wondrous old library overlooking the nation's capital.

A historic neighborhood church is reborn as a psychedelic arts collective.

The United States Capitol's former columns still stand.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The home of the first American-born saint is one of the only curved buildings in New York.

One part antique store, one part curiosities hodge-podge.