This historic black and white monastery is one of Bulgaria's architectural jewels.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

Towering basalt columns, a creation of fire and ice.

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

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall, but rather lightning.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

"Only the devil could play golf here."

The ghostly remains of an accidental sea.

This California tree is the single source of the state's entire orange industry.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Thousands of turbines whir at the origin of North American wind power.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Decommissioned experimental solar facilities that pioneered solar energy technology.

This giant temperature attraction created some giant electric bills.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

When ecosystems collide in the arid Southwest.