Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

The angel of death appears to weep black tears at this grave marker.

The "Seinfeld" diner.

There aren't too many operational funiculars around, but Pittsburgh has two!

Megachurch turned Catholic church comprised of 10,000 glass panes.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

20,000 pieces in a Frank Gehry-designed building.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Rare recess caves fill this unbelievably beautiful Ohio park.

A geological mystery on Camelback Mountain.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

The world's largest Our Lady of Guadalupe statue overlooks this Ohio sanctuary.