One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

Largest collection of mounted dinosaur specimens in the world.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Dig for your own trilobites in this goldmine of invertebrates.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

An emporium for the weird, creepy, rare, and just plain gross.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

This general store offers visitors a glimpse back into the 1930s.

Traversing these canyons, visitors can take in stunning views and glimpses of the region's history.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

Somewhere between an art studio and a print shop, this artists storefront is a house of worship devoted to type.

A glittering South Asian anomaly in a wealthy Los Angeles suburb.

The stone walls of a home built to withstand a California wildfire still stand after more than a century.

Acres of natural wonders left behind by a socialite-turned-gardener.

The beautiful behemoth is one of the largest trees of its kind in the United States.

The home of one of California's most important horticulturalists wilts amidst a lovely park.

A popular winter vacation destination for migrating monarch butterflies.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.