European castle ruins in an American state park are actually the product of death and grief.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

In Edwin Hubble's hometown, a scale model of the groundbreaking telescope that was named in his honor.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

This stone is a marker of one millionaire's personal vendetta against gravity.

A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

The final resting place of the world's first nuclear reactor.

A bizarre house filled with an astounding array of collections.

Former hotel turned into haunted playground.