The original place where water met land in the City by the Bay is outlined in brass.

A hidden three-foot-wide house separates these two regal churches.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Norway has built what may be the world's most beautiful public toilet.

A natural dome made of volcanic glass in Inyo National Forest.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

An enormous, inside-out glass globe built in 1935.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Delightful disarray of found objects and clutter.

Taking the 3D art experience far beyond blue and red glasses.

A huge collection of rocks, gems, and crystals.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A tourist attraction founded around a slumping cabin.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

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.

Home to the only outdoor municipal elevator in the United States.

Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

This bridge provides safe passage for squirrels.

This nature center has one of the largest collections of native raptors in the Pacific Northwest.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

This folk museum is devoted to small figurines of provincial village life.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.