This elaborate towering structure was once famed for its revolutionary height.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A fake town founded by Western movie stars is now becoming a hip desert community.

The decaying adobe remains of an old homestead are just off the beaten path in Joshua Tree National Park.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

A hand-built folk art installation covered with messages of God's love.

An off-grid art installation that encourages its visitors to imagine a world without waste.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

One New Hampshire alleyway has become home to a public gallery of feline art.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

A stunning garden filled with fantastical environmental folk art and sculptures.

A mysterious stone embedded at the base of a historic Boston building.

Beautiful Victorian buildings from L.A.'s forgotten architectural past.

An vast warehouse of everyday treasures in Berkeley, CA.

This picturesque abandoned home is rumored to be a spite house.

The massive machine creates cracking displays of indoor lightning.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.