Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The entire history of the U.S. Space Shuttle Program is painted on an enormous roadside water tank.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Beautiful steampunk ghosts of early Massachusetts.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

A museum dedicated to exhibiting remarkable outsider art.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

An artificial crater field that trained astronauts for lunar exploration.

This old mining town, deep in the California desert, has a year-round population of one.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

One of the last remaining movie theatres in the country that features a rear-projection system.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This hotel was the site of major events in sports and radio history. It was also used as a detention center during World War II.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

America’s oldest community theater, this Boston club has been in operation since 1877.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.