Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

Unlike most arches, this geological oddity formed in a volcanic dike.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

The largest self-built castle in the U.S., six decades in the making.

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

This massive sycamore tree has been labeled as one of the largest in the state.

An unusual and eclectic collection of local historical memorabilia.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

This historic furnace was once used to produce cannonballs during the Civil War.

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

This roadside stand packs 300-plus varieties of tomatoes, from "Maiden's Fire" to "Kaleidoscopic Jewel."

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.