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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

An eclectic restaurant serving from and to the nearby Chittenden Locks.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

One of the oldest continually operating drinking establishments west of the Mississippi.

A nondescript Seattle restaurant inherited a piece of European history.

Seasonal, Pacific Northwest cuisine served in a 101 year old firehouse.

A busy cafe better known for board games than food.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

This popular bar has been blurring the line between normal and edgy for more than 75 years.

A brewery warehouse which doubles as a circus bigtop.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

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

Micro-nation based around a nine-story high illegally built tower.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

The library's graceful rotunda is like a bibliophile's temple.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

These mysterious circular formations are actually remnants of 19th century gristmills.

The dome-shaped reservoir of this old water tower produces unique acoustic effects.