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

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

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Every president in history is immortalized in bronze in downtown Rapid City.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A museum within a museum, devoted to history's most questionable medical devices.

A museum dedicated to the exploring past, present, and future innovations.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

When flour explodes, it's not a pretty sight.

The only arched bridge made of stone on the entire Mississippi River.

The "lovely red Vega" of the legendary record-settling pilot.