Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

This restaurant was removed from the famed sister ship of the Titanic and placed within a hotel.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Huge winged monument in the United Kingdom.

Golden Gate Park's historic collection of plants.

California's most comprehensive horticultural library.

The remains of a 12th-century chapter house in Golden Gate Park.

This tiny structure was built by the creator of the Brooklyn Bridge.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A unique sculpture park that specializes in the huge and bizarre.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

See massive fossils that are over 200 million years old in northeastern Arizona.

The final resting place of the living embodiment of the famous Forest Service symbol.

The winter home of thousands of beautiful snow geese and sandhill cranes.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."