Though many were skeptical at first, these animal-specific routes across the Trans-Canada Highway have been a major conservation success.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

The world's first disc golf course has the Jet Propulsion Laboratory as a neighbor.

California's longest-running tourist attraction is a stump.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

Come for the speed, leave in love with the desert.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.

A tribute to one man's legacy of improving the accordion's reputation.

The tallest bridge in California was constructed for a project that was eventually cancelled.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

It's estimated that half of the world's gold was mined from South Africa's "golden arc."

Unconventional site where the tracks of Zurich tramcars intersect.

Art Deco stylings conceal the true nature of this bridge.

Mid-Century Modern Meets Millionaire’s Row.

This decommissioned DC-3 now forever points into the oncoming wind.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

From silent movie theater to rock &roll palace and beyond.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.