This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

A tunnel with windows, so you don't miss out on the impressive views.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

Nelson Mandela lived here with his family from 1946 until his arrest in 1962.

This dry lake bed contains the oldest known petroglyphs in North America.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.