This cavern was used as a hidden hospital and safe house during the Vietnam War.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

An extravagant monument to an extravagantly unpopular Emperor.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

A Seattle oddities shop brimming with Victorian-era gems and antique curio.

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

This working class sculpture pounds his hammer all the livelong day.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

A piece of Seattle’s historic Chinatown preserved inside a modern museum.

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

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

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

An enormous park-like oasis, full of famous Chicagoans' graves.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

A Bibliophile's Dream.

One of the last functioning antique elevators in Chicago.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.