A museum filled with tiny, adorable versions of the mighty Royal Danish Navy.

A city built from mud and known as the "Manhattan of the desert."

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

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Surreal works of unreal stone and metal dot the landscape of this Latvian art park.

This huge industrial sculpture looks like a UFO and a factory had a baby.

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

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

America's post-nuclear-attack chambers of Congress.

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.

This abandoned fighter jet launch center is now a haunting street racing course.

These crumbling Latvian forts make for some haunting seaside ruins.

In one Santa Monica parking lot a mushroom cloud made of chains heralds a message of peace.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

The seat of Buffalo government is a gorgeous Art Deco palace.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

Instead of becoming a power plant, this abandoned complex became a massive letdown.