An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

The ancient tomb acts as a calendar that keeps perfect time.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

The humble beginnings of the man known for his lavish "champagne" music.

Part of a secret 1970s nuclear defense program is now open to the public.

A true roadside icon standing on the same plains that the herds once roamed.

One man's quest to save his town with a trail of record-breaking sculptures.

A cemetery housing wild west legends in South Dakota.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An underground city of salt.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Real bones which are said to have belonged to a Polish dragon.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

The largest piece of cut lead crystal adorned a grave for 75 years and is now the shining star of a glass museum.

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

See the nearly two-century-old ruins of pre-railroad America at the former site of a lock on the Ohio and Erie Canal.

This one-room cabin where the young colonel slept during the French and Indian War.

Rare recess caves fill this unbelievably beautiful Ohio park.

This recycled wax museum may be the only one that features John Travolta in a Bible scene.

Constructed in 1882, this jail once housed local inmates and the sheriff's family all under one roof.