Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Plot your trip through the city on the sidewalk.

A modern zoetrope on the New York City subway.

Elevated freight railway turned wildly successful urban park.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

What was once a unique system of urban elevators is turning into a mechanical ruin.

A collection of abandoned typographic signs from Berlin and beyond.

Ride the subways of yesteryear.

Japanese national treasure originally built in 593 CE.

The original "capsule building" is a masterpiece of Metabolist architecture.

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

A one-of-a-kind collection of a unique medium.

The final resting place of a space program monolith.

This historic tower in the California desert promises visitors a "vortex of good vibes".

A world-class observatory in the California desert.