This giant disembodied horse head seems to balance impossibly on its nose.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

Local legend says the remains of Father Christmas lie within the medieval grounds.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Over 12,500 words are scrawled across each room of this historic plantation house and no one knows why.

The skeletal white beams stand as a monument to religious dissent.

The 14th-century ruins are said to contain healing powers.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

A brick-paved former section of the historic coast-to-coast highway.

Fascinating exhibits of prehistoric and ancient artifacts displayed with a uniquely modern touch.

The Hopi-style structure was built by the man who discovered Desert Hot Springs' famous mineral water.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

An abandoned Depression-era zoo hidden just off the highway.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

A fascinating collection of art made from petrified wood and fossils by two octogenarian twin brothers.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

An abandoned socialist utopia built in the late 19th century.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.