A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

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

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

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

A homage to the King at the hotel where he revived his career.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The longest living non-clonal organisms on Earth.

This painted marvel is San Francisco's 400-foot ode to urban biking.

This contorting sculpture is the tallest in San Francisco.

Standing in for the first ship to navigate the Northwest Passage.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

A former hardware store near Yerba Buena is the official home of California's history.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.