Beehive charcoal kilns and slag deposits mark this late 19th century camp centered on a smelter.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

Visit a church sculpted from hardened lava.

A monument to peace, built by one man over the course of 25 years.

Watch a magnificent, ever-changing colorscape inside James Turrell's immersive work of art.

Dedicated to the largest armed uprising in American history since the Civil War.

A memorial commemorating the place where Truman gave the order to deploy the first nuclear bombs on Japan.

A well-preserved sheepherding camp now lies in the heart of the Granite Chief Wilderness, in the high Sierra Nevada.

The site of an improbable and ill-fated attempt to use dammed floodwaters for irrigation.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

The famed poet was born in 1819 in a farmhouse built by his father.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

A difficult trail leads to interesting ruins in a remote canyon in the Toiyabe Range.

A bronze sculpture of a white dove commissioned by Pope Benedict XVI.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A rare specimen of an iconic extinct animal in downtown Sydney.

This candy-pink cathedral of Da Nang is also known as the Chicken Church.

A petroleum heritage museum on the site where James Miller Williams dug the first commercial oil well on the continent in 1858.

A monument commemorating the discoverer of radio astronomy.

This 317-ton walkable art installation is an homage to Korea's "City of Steel."

A remarkably well-preserved brick chimney from a smelter dating to the 1860s is all that remains of this former mill.

An abandoned military bunker that has been transformed into an artist's paradise.