This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Quite simply the largest tree in the world (by volume).

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The small town of Poulsbo in Washington state is the next best thing to the Kingdom of Norway.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

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.

Dramatic river bend surrounds a natural red-rocked pedestal.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancient pueblos built into the base of a natural canyon wall.

The stone circle honors the 19 firemen who perished during the Yarnell Hill Fire.