A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

China's monumental dinosaur museum featuring an open dig site.

A replica of the Statue of Liberty watches over the tomb of 72 Chinese revolutionaries.

Rows of stone statues are dressed up to mourn children that are lost before birth.

Once a black market electronics marketplace, now an otaku shopper's paradise.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This erect, phallic geological spire wasn't always named so domestically.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Lone survivor from Custer's Last Stand forever preserved.

The fairy tale castle of the "fairy-tale king."

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

It was once the base for a series of domestic terror attacks.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

The first memorial dedicated solely to the Black troops who fought for the Union.

This unassuming passageway played a key role in one of the most important events in U.S. history.

This statue of the "father of television" stands prominently in the United States Capitol.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.