Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

The location where the American Revolution ended.

The taxidermy remains of the most popular pony in children's literature.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The only recreation of William Shakespeare's indoor playhouse.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This historic tower in the California desert promises visitors a "vortex of good vibes".

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

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

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

A historic freight system that found the true gold rush is in tourism.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

One of two side-by-side totem pole parks dedicated to educating visitors on Tlingit history and culture.

The illuminated falls are a gem in North Cascades National Park.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

A giant knight, sex education, date shakes, and Jesus coexist happily in this Coachella Valley desert oasis.

Explore the wide world of desert plants at this unique Palm Springs botanical garden.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

The shop's owner has spent decades in the desert wearing nothing but a strategically placed sock.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

A stunning landscape of bunkers that once stored chemical weapons.