A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

The last remaining vestige of a popular 1999 public art display.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

One of the largest Buddhist communities in the West sits on the site of an old hospital.

Naturally carbonated water fills the mineral baths at this 19th-century California resort.

The famous aviator's final resting place is a study in natural beauty.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This coastal cavern is associated with the Hawaiian god of creation.

One of Oahu’s best snorkeling and diving spots was created by warm water discharged from the nearby power plant.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

This mission, established in 1771, is the most remote of California’s Franciscan missions.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

An ordinary rancher stumbled upon one of the world’s largest collections of Pliocene horse fossils.

This Idaho state park boasts the tallest single-structured sand dune in North America.