The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Elevated freight railway turned wildly successful urban park.

Stroll through a wonderland of stupendous moss-covered trees.

Spiral labyrinth hidden in the hills above Oakland, CA.

The world's largest rotating world.

A walk through the historic city center, under the streets of Seattle.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

The little-known final resting place of one of America's greatest writers.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

California's longest-running tourist attraction is a stump.

His discovery kicked off the Gold Rush. One of the hands on this commemorative statue points to the spot where he found the precious metal.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

The world-record holder for the longest bridge stretching continuously over water.

A local prank turned town icon.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

A natural dome made of volcanic glass in Inyo National Forest.

The Flatiron Building's storied West Coast cousin is a lot more into religion.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

An vast warehouse of everyday treasures in Berkeley, CA.

One man's prolific, decade-long quest to turn trash into artistic treasure.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.