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Snoqualmie Tunnel
North Bend, Washington

Snoqualmie Tunnel

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.
47.3953, -121.4446
Close up of the condition of the fleet.
Benicia, California

Suisun Bay Ghost Fleet

The rusting remains of the largest assembled WWII fleet on the West Coast.
38.0733, -122.0971
Sunny Jim cave
San Diego, California

Sunny Jim Cave Store

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.
32.8492, -117.2703
Photograph of City Hall some time prior to 1947.
Port Townsend, Washington

Port Townsend City Hall

City Council meetings still happen in his historic building, impeccably preserved on the inside.
48.1161, -122.7524
Bunker Hill Monument
Boston, Massachusetts

Bunker Hill Monument

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.
42.3761, -71.0600
Battery Spencer with with the Golden Gate Bridge in the background
Sausalito, California

Marin Headlands

Concrete strongholds stand guard over the Golden Gate.
37.8339, -122.5329
Nike Missile Site SF-51
Pacifica, California

Nike Missile Site SF-51

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.
37.6117, -122.4586
Exterior view of the Vehicle Assembly Building.
Titusville, Florida

NASA Vehicle Assembly Building

A building so large that it has its own weather.
28.5863, -80.6513
The final pool emptying into the ocean
Kula, Hawaii

'Ohe'o Gulch Pools (Seven Sacred Pools)

A series of waterfalls and pools flow through the O'heo Gulch and into the ocean.
20.6634, -156.0424
Coco Palms Resort
Kapaa, Hawaii

Coco Palms Resort

Kaua'i's very first resort is now an abandoned relic.
22.0488, -159.3358
Lahaina, Hawaii

Lahaina Banyan Tree

Take shelter from Hawaii's tropical heat under the massive canopy of largest Banyan tree on the island.
20.8719, -156.6774
Greenwich Foot Tunnel
London, England

Greenwich Foot Tunnel

A 1,215-foot tunnel transports pedestrians beneath the River Thames.
51.4833, -0.0102
Note Leyh in the sphere.
Kaukapakapa, New Zealand

Electrum

The world's largest Tesla coil.
-36.6167, 174.4983
Warrenton, Oregon

The Wreck of the Peter Iredale

100-year-old shipwreck you can walk up to at low tide.
46.1784, -123.9810
Waitomo, New Zealand

Waitomo Glowworm Caves

A cave lit with glowworms.
-38.2610, 175.1043
Gwynedd, Wales

Portmeirion Village

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."
52.9176, -4.0929
Seattle, Washington

Lenin Statue of Fremont

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.
47.6515, -122.3513
Seattle, Washington

Fremont Troll

A giant Troll lurks under a Seattle bridge overpass.
47.6510, -122.3473
Fremont Bridge
Seattle, Washington

Fremont Bridge

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.
47.6476, -122.3498
The top of the Space Needle exemplifies Googie architecture. (Wikimedia Commons)
Seattle, Washington

Space Needle

Iconic symbol of the Pacific Northwest.
47.6201, -122.3484
Skamania, Washington

The Ape Cave

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.
46.0858, -122.0069
Hallstatt, Austria

Salzwelten: The Hallstatt Salt Mine

The world's oldest known salt mine.
47.5573, 13.6470
Seattle, Washington

Museum of Pop Culture

A museum dedicated to the history and exploration of both popular music and science fiction.
47.6216, -122.3481
The old general store
Beatty, Nevada

Rhyolite Ghost Town

Odd outsider art installations surround a Gold Rush era ghost town.
36.9037, -116.8282