This New York estate was designed to resemble a medieval Scottish castle.

This small park holds what remains of a former prison and execution ground.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

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

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

The longest continuous lava tube in Oregon.

Only known mainland rookery of the threatened Stellar sea lion.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

One of the largest underground systems runs under Canada's largest urban center.

An abandoned 1970s theme park that has been turned into a space for waterfront walking.

A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

The southernmost outpost of the Russian Empire in colonial America.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The unbelievably opulent home built for an infamous newspaperman.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A monument to a working class martyr.

Taihape's claim to fame is a fictional Kiwi farmer wearing gumboots.

What remains of the simple red brick chapel where the women's rights movement began.

Visitors to this library are in for a real-world education in modernist architecture.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.