A museum in the former home of Marxist revolutionary Leon Trotsky.

The only castle in North America to ever house European sovereigns.

66,000 pieces of art, donated by one of the world's richest men.

Frida Kahlo's childhood home, now a museum of her life and works.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

A commemorative mural in this tiny Ballard park honors the neighborhood's rich Scandinavian ties, particularly with Seattle's Norwegian sister city Bergen.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

An ice cream parlor chain that caters to vegans and pinball fans equally.

A colorful architectural gem in Seattle’s uniquely modern Central Library.

Couple's personal collection of pinball machines turned public pinball museum.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

A walk through the historic city center, under the streets of Seattle.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

It's not your typical library, memorial, or book store.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

California's oldest wind harp represents a historic piece of America's Danish history.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

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

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.