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

This massive, ancient stone was disassembled and then put back together again.

100-year-old shipwreck you can walk up to at low tide.

A Roman-style column in Oregon hides a spiral staircase inside.

Where Nor'easters go to die.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Delightful disarray of found objects and clutter.

An emporium for the weird, creepy, rare, and just plain gross.

Portlandia is the second-largest copper repoussé statue in the United States.

The magic's in the hole!

Seattle's own bad art museum located inside Cafe Racer.

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

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A wall of chewing gum moonlights as collective art.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A bizarre house filled with an astounding array of collections.

Museum preserving torture methods from the past.

Hear the quietest sound from across the dome.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Inside a former cabaret, seven floors of erotic art.

Site of a classic 19th-century physics experiment to prove the earth is rotating.