The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

The sole surviving relic of the San Francisco neighborhood cobbled together from old horsecars and streetcars.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This Elizabethan hedge maze is one of only six in North America.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This park straddling the United States-Canadian border has been a symbol of peace since 1932.

The abandoned tuberculosis sanatorium is said to be one of the most haunted places in Canada.

Dedicated to the people of Indian Head, Saskatchewan.

The "Paris of the Prairies" wouldn't be complete without a replica of the iconic landmark.

This more than a century-old cathedral has seen its fair share of redesigns over the years.

This bushy bug is one of the unsanctioned public sculptures that have survived in Regina.

This Art Deco landmark claims to be the longest bridge over the shortest span of water in the world.

The world's largest moose statue is located (where else?) in Canada.

Underground tunnels once home to crime are now back open to the public.