This playground sculpture of an icon from the past is dedicated to the children of the future.

An obscure waterfall that looks like something out of a fantasy novel.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

An extraordinary mixture of natural beauty and man-made phenomena.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Quite simply the largest tree in the world (by volume).

Four hundred granite steps were built into this massive rock by the National Park Service.

A small sculpture garden that provides a microcosmic representation of California.

The mayor made the declaration in 2004.