One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

The headquarters of a secretive order is also a beautifully-designed park.

A giant chess set, minus the psychedelic drug trip.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A much-maligned monument to teetotalism.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

Beneath unsuspecting visitors feet, a capsule containing pieces of America’s civil rights history.

A miniature representation of Canadian cities and landmarks in incredible—and sometimes hilarious—detail.

Secret Swing.

Willy Wonka would love this weird half-a-home.

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

The artwork commemorates the many ways 20th-century people perished while on the clock.

Known as "Toronto's Flatiron."

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

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

A tiny graveyard with a mysterious past.

A small island hides in plain sight on Austin's Lady Bird Lake.

This massive oak tree has ties to the first native tribes of the region and the founders of Texas.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.