A man used his Civil War-era fortune to build this sanctuary in memory of his wife.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A former infectious disease laboratory chronicles how tuberculosis shaped a village nestled in the Adirondacks.

A mysterious echo seems to defy the laws of acoustics.

Fossilized sea bottom and lime quarry.

This stained glass window designed by Tiffany Studios is hidden behind the circulation desk of a public library.

Oldest building in California still in use.

The design of this ornately decorated place of worship closely mirrors a church in Vietnam.

Megachurch turned Catholic church comprised of 10,000 glass panes.

This exhibit is devoted to the games and wonder that Hasbro has brought children worldwide.

An approximately 500 million-year-old rock outcropping covered in fossilized bacteria.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

This decommissioned surface-to-surface missile resides outside the American Legion Post in Pennslyvania.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

A natural history wunderkammer in the middle of the desert.

An homage to everyone's favorite prehistoric cartoon family.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

This collection of neon icons is preserving Arizona's history, one sign at a time.

A Tucson museum and performance space full of found-object movable sculptures.

The fading, forgotten remains of a once bright and booming factory.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

These conical kilns measure an impressive 30 feet in diameter, and were once used to produce charcoal for a local blast furnace.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.