Public works and national defense project meant to carve a canal all the way across the state of Florida.

The final resting place of New Orleans' most famous voodoo priestess.

This historic headstone is said to mark the final resting place of a doubly-dead white witch.

The stone labyrinth in this New Orleans city park was laid to symbolize healing in the wake of Hurricane Katrina.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A micronation on an islet along the coast of a Portuguese island.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

A scenic ravine with an astounding collection of rock art created by the Indigenous people of the Great Plains.

One of the American Southwest's most extensive collections of Navajo rock art.

More than 21,000 images fill this overlooked gem of a prehistoric site.