Golden Gate Park's historic collection of plants.

San Francisco’s condensed garden of incredible plant growth.

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

This concrete sculpture features a woman opening her heart to showcase a beautiful fern.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

A spiritual vortex among the red rocks in Sedona.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

San Francisco's newly reopened hands-on science museum.

The drama of nature in full effect in this Nevada State Park.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

A collection of haunted objects and macabre oddities under one roof.

In which a local geological marvel becomes a quaint roadside attraction.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.