Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This iconic science fiction house still looks like something from the future.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

There must be a pun in this haystack somewhere...

A dilapidated dock tells the story of Titanic's missed arrival.

Elevated freight railway turned wildly successful urban park.

These lush botanical gardens employ the most purrfect pest control force.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This dramatic rail curve was once the target of a failed Nazi attack.

A field of nothing but boulders which resembles a giant's gravel driveway.

A local prank turned town icon.

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

The oldest farmer's market in America is so ancient it was approved by the King of England.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The first American department store, and home to the largest operating musical instrument in the world.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.