The site of Stockholm's last public execution.

Impressive artifacts from Juneau's gold mining days fill this mining site-turned-museum.

Siberian husky that delivered a life-saving antitoxin.

Low tide reveals 8,000-year-old rock carvings in Southern Alaska.

Don't be a grizzly man. Get personal with Alaska's wild bears from the safety of this conservationist camp.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

This amazingly preserved Gold Rush town is a historian's dream.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

See just what life was like in a 19th-century prospecting town.

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

This remote fort on the Yukon River is a vestige of the wild Alaska gold rush.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

The only natural cave bath in all of Europe.

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

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

This pebble beach is so beautiful that taking its rocks is against the law.

Cliffs full of fossils at the portal to England's Jurassic Coast.

A trash dump made beautiful by nature's power.

This black shoreline is made up of exploded lava particles.

Once home to Komodo dragons, this island dreamscape has a rare combination of white, pink, and black sand beaches.

Olfactory delights in San Francisco's Botanical Gardens.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

A journey through the history of medicine throughout the centuries.