A former hospital is now home to a pizza parlor and maybe a few ghosts.

A local landmark with generations of spraypainted messages, and more being added each day.

This now-deactivated naval base defended the Florida coast for centuries.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

There's more contention than one might expect from cherry pie pans.

A mysterious emblem tucked in an small alleyway is actually the coat of arms of a heroic medieval family.

A 20th-century picture show in 3-D.

An underground city of salt.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

These numerous Israeli caves were dug out over hundreds years for reasons ranging from hideouts to burial sites.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

This grubby wall is said to be one of the Earth's esoteric energy centers.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This fairytale medieval church in Poland originally spent centuries in Norway.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A statue honors the children who fought Nazis in Poland.

Tel Aviv's popular neighborhood went though endless waves of transformation.

One of only three fountains created by the iconic architect Friedensreich Hundertwasser.