A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A lush green oasis in the middle of Chicago.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

This huge clock made of flowers and simple machinery was once used a political weapon.

One of the greatest boxers and humanitarians to ever live chose his hometown as his final resting place.

Unique tower has outlasted a takeover of the company.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

An enormous natural sandstone bridge in Kentucky.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

The world's longest known cave system.

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

The only freestanding table rock formation east of the Mississippi.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

Installed as a beacon of hope for a hurricane-racked island, the statue had to be moved multiple times due to the eroding coast.

A museum chronicling pioneer life constructed over Interstate 80.

Yo, Adrian!

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.