Thousands of lawn gnomes have infested this Australian roundabout.

This abandoned subway station can still be seen on regular commuter trips.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

A former suicide bridge is now accumulating symbols of love instead of a body count.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.

One Greenland town turned itself into an open air sculpture gallery with the help of a series of traditional stone artworks.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

This mouldering abandoned mental hospital was once a center for progressive healing.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

A miraculous natural phenomenon known as "the spring that breathes."

This Czech military museum is home to pink tank that was once a symbol of art and political rebellion.

This small road tunnel is the only place where you can cross beneath the Erie Canal.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The mysterious remains of a martyred teenage saint are venerated inside a small country chapel.

In this truly magical place, rent hasn't been raised since the year 1520.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.