Idol made by King Jeroboam for the Israelites.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

A clear blue swimming hole with hidden caves, still unexplored.

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

One of two side-by-side totem pole parks dedicated to educating visitors on Tlingit history and culture.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The Dead Sea Scrolls were discovered in the ruins of this ancient monastic community.

The only quarter of the Old City not dedicated to a major world religion.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The world's longest known cave system.

"A hideous albatross in the Hudson River Valley."

Protecting the future of some of the rarest and most misunderstood mammals of North America.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A historic freight system that found the true gold rush is in tourism.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.