Eccentric concrete mansion and museum designed and built by hand from the inside out.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

Vikings and Evangelicals have both had a hand in this replica medieval church.

These giant metal horses graze on a hilltop near the Montana highway.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

A vinyl-lover's Shangri-La.

This sculpture forces visitors to confront their relationship with space.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

Every summer West Seattle experiences a housing bloom.

This unique Seattle structure was designed to be the greenest commercial building on the planet.

This tiny home built on revenge appears to be scarcely wider than a Volkswagen.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A colorful architectural gem in Seattle's uniquely modern Central Library.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

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

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

A memorial to a shareholder activist feared by CEOs around the United States.

A building shaped like the Army Corps of Engineers logo, because why not?

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.