This giant temperature attraction created some giant electric bills.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

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

A fitting attraction for the corn capital of the world.

The first declared National Monument in the United States.

The only road through the heart of Glacier National Park.

This quirky roadside attraction dives into the many theories surrounding North America's most infamous hairy cryptid.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

From the Difference Engine to the Cray-1, all under one roof.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

Quite simply the largest tree in the world (by volume).

A massive volcanic plug is now a protected area that hosts a number of bird species.

A hotel and restaurant serving as the mecca of kitsch.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Church built on the site where the last tsar of Russia and his family were killed.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.