This tiny, hurricane-resistant house in Galveston is one of the city's most notable architectural oddities.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

During its heyday, 72 one-ton buckets from this dredge bore into the Powder River excavating vast gold deposits.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

This private residence was the template for one of the most beloved television homes of all time.

The unbelievably opulent home built for an infamous newspaperman.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

This semi-hidden Manhattan restaurant is based out of a loading dock.

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.