A vibrant colony of rescued wolves and other canids.

Amid rushing rapids, this small bit of land is an important First Nations site on border between Canada and the United States.

The largest riverfront opening cave in the Ozarks.

Once a giant oak that served as the region's post office.

A multiversal transit station located right below a highway interchange.

A rare memento of a lost Indigenous group.

The seventh largest spring in the world.

The last vestige of a once substantial orchard and farm in the suburbs of Northern Virginia.

An oasis of lilies cultivated by the "Indiana Jones of Water Lilies."

The largest public collection of roses in the United States.

No one knows exactly how deep the world’s deepest geothermal hot spring is.

No shoes allowed on this trail, which is designed to be experienced barefoot.

At the base of the Spring Mountains, a unique nursery packed with desert plants.

South of Bologna, a limestone grotto with a protruding waterfall and a floor full of cave pearls.

At an estimated 3,800 years old, this olive tree is one of the oldest on earth.

A waterfall rushing through a lush fern gully in Australia's Tarra-Bulga National Park.

The spherical grains of white quartz sand give every step on this Australian beach a distinctive sound.

This educational and eco-friendly community is Iceland's "home of the sun."

Greenery covers the face of a gently-dripping waterfall deep in the mountains of central Sardinia.

A set of tall pillars and alcove-like rooms that are significant to the Miami people of Indiana.

The warmth and creative kitsch of a quilt engulf every patron who visits.

A Jurassic artscape composed of transmission casings and other mechanical parts.

In British Columbia, a unique microclimate has allowed these trees to live much longer than they usually would.

Once the smallest park in the national system.