An innovative attempt to break a siege in the American Civil War still scars the earth today.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The land is home to swimming ponies and a legendary 18th-century treasure.

Home to the deepest rift anywhere on Earth.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

Buffalo's abandoned concrete grain elevators are getting a second life.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A historic lighthouse steeped in rumors of ghost and pirate stories.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The fifth-longest natural arch in the world, and the longest outside China.

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.

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

Iconic rock formations that allow for exploration during high or low tide.

The ghostly remains of what was once the world's richest copper mine.