This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

An incredibly well-preserved piece of ninth-century Viking poop.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

The oldest continuously operating church in California.

This preserved village shows the modest lifestyles of the area's 19th-century Chinese gold miners.

A tree grown from astronaut seeds which were exposed to cosmic rays.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

The first safe in this California town had to hold all the gold.

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

Haunting and beautiful trees, doomed to die.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

This remarkably simple jail went over a century without an escape.

The stately birthplace of California's statehood.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A floating cat sanctuary on an Amsterdam canal.