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.

The only remaining sod house Oklahoma built by a homesteader in 1894.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

With its vaulted ceiling and gilded details, this University of Washington library would feel right at home inside an old palace.

The longest of the four remaining covered bridges in Missouri.

These unique rock formations were created during the Ice Age.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

This small, nautical gift shop is home to a 500-pound behemoth.

This Colorado fire station has been in continuous operation for more than a century.

This hat-shaped fountain pays tribute to a centuries-old textile tradition in the Yucatán Peninsula.

Hidden in this little-known town stands a piece of agriculture history.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

Theme park featuring miniature replicas of European monuments.

Lavish royal estate punctuated with heated greenhouses.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.

One of the few remaining covered bridges in Lancaster County.

This sandstone building is a relic of the Overland Trail.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

An abandoned World War II bunker is part of a chain that runs throughout Washington.

A relic of World War I that now exist as a piece of public art.

Irontown was founded in 1868, as a second attempt to mine iron from the nearby Iron Mountain.

Dedicated to a U.S. Army lieutenant colonel who was also a bird watcher and artist.

One of the best places in Florida to spot rare, carnivorous pitcher plants.