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

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

A subterranean house of worship carved right out of the bedrock.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

An alien church provides much needed silence in the midst of a Finland shopping center.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Copenhagen's celebrated theme park and gardens.

The simple auditorium that launched a pop icon's career into the stratosphere.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

A surreal, Gaudi-inspired play space near an Anaheim community center.

Four hundred granite steps were built into this massive rock by the National Park Service.

The quiet canyon has a tumultuous history involving a doomsday cult.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

Oldest building in California still in use.

An vast warehouse of everyday treasures in Berkeley, CA.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

A house built from trash known as the poor man's Hearst Castle.

This turn of the century masterpiece has a mysterious goaty interloper.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.