A famous hotel houses an impression collection of mini dioramas and giant doll houses.

This historic Victorian hotel has a scandalous history of affairs and murder.

100-year-old shipwreck you can walk up to at low tide.

A Roman-style column in Oregon hides a spiral staircase inside.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

An important Mayan religious and trading center dating back to 200 BC.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

"The House That Love Built" is shying away from "The House That Ghosts Love."

Race through the maze, get your name on the sign.

What remains of the summer palace of King Kamehameha III.

Hiding in plane sight.

An ode to one of the first concerts broadcast via satellite.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

The humble beginnings of one of America’s greatest songsmiths.

A statue honoring 44 continuous years of greeting passing ships.