The world's oldest bookshop still in operation.

A surreal statue honoring Prague's favorite literary son.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

A massive sea stack famous for its appearance in The Goonies.

Shakespeare has been brought to life in this open air theater for the better part of a century.

A public fountain that spouts "health water" from a nearby spring.

A stunning landscape of bunkers that once stored chemical weapons.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

This sandstone mansion was the home of two of Oregon's most important pioneers.

Portlandia is the second-largest copper repoussé statue in the United States.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Two massive rock outcroppings on the Oregon coastline.

The longest continuous lava tube in Oregon.

A tourist attraction founded around a slumping cabin.

Only known mainland rookery of the threatened Stellar sea lion.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A white Buddhist temple with a golden restroom.

The prototype for all Nazi concentration camps.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

An accidentally hidden library containing the ephemeral history of New York.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.