A full-scale replica of a 1774 colonial settlement in Kentucky.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

This beautiful architectural gem was the first waste treatment facility in Boston.

England’s ancient oak tree has such an impressive girth, people have been hosting parties within the hollow trunk for centuries.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

The world's largest floating loon bobs in the lake to kick off an annual festival.

A competition inspired by Stephen King's psychological horror novel "The Long Walk."

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The bizarre headgear looks like it was made for a fool, not a king.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

This whimsical sculpture garden is a local treasure.

A reconstructed farm shows what life was like in Norway 1,500 years ago.

Colorado's only true geyser is hidden within the San Juan National Forest.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

The quirky collection includes treasures like Elvis' underwear, Bob Barker's toothbrush, and hundreds of sock monkeys.

Thousands of people walk over this fantastic work of art every day, but how many notice it?

One of the U.K's earliest public water supplies is within the "plague village."

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Fragments of the former temple's lost facade are now displayed in a strange library of stones.

The final resting place of the controversial chess champion.

A historic cemetery doubles as a museum containing hundreds of unique tombs sculpted by a single artist.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.