The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

This stunning concert hall has become a symbol of Iceland's national recovery.

This tiny museum's sizable collection is jammed into a former underground public toilet.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Austin’s nonprofit-run graffiti park where street art is meant to be painted over.

This old abandoned sign flickers to announce a motel that isn't even there.

A Prada store in the West Texas desert that is never open for business.

Explore 10 acres of environmental sculptures.

Version of the French Riviera destroyed by the sea.

The ghostly remains of an accidental sea.

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

The smallest post office in the United States is no bigger than a broom closet.

The bottle house obsession struck a Florida man in his retirement, and now he can't stop building.

A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

This now-deactivated naval base defended the Florida coast for centuries.

St. Augustine's record-setting narrow street was designed to protect against pirates.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

Where monkeys run wild and the humans are caged.

A luxuriant botanical garden below sea level.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A mysterious castle built as a monument to lost love.

A much more welcome kind of snowbird vacationer, manatees camp out in these springs every winter.