Designed as a place for patients to take in the scenery, this tower has a dark history.

Play everything you see at a museum dedicated to a town's historic organ industry.

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

An underground magnet for ever-changing street art.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

This ancient art form was used to capture the lives and struggles of the Haywood Street ministry.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The first transatlantic wireless signal was received at this 17th-century fort.

This underground power plant looks more like a super-villian's lair than a public work.

This huge ship ran aground and has simply been left to sit there ever since.

An abandoned amusement park hints at the twisted history of the Newfoundland Railway.

A forlorn fishing village on the coast of Labrador, full of shipwrecks and Spanish gold.

A World War II gun battery sits at the easternmost point of North America.

From this isolated strip of land in Newfoundland, Amelia Earhart became the first woman to fly solo across the Atlantic.

This oddly named town refuses to change its phallic moniker.

This rocky spread has been squeezed up directly from the bowels of the earth.

Hundreds of enormous icebergs drift through this waterway every year.

An ancient Viking village in North America that predates Columbus by 500 years.

A 12,000-year-old bog boasting rare plants and fauna.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

This mysterious cliffside carving of an ancient Hittite deity has baffled scholars for centuries.