European castle ruins in an American state park are actually the product of death and grief.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.

This museum houses two of Mexico's most impressive Aztec monoliths.

Few of the many visitors to this resort town know of its hidden Maya ruins.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

105-foot wide giant metallic flower blooms anew every day in the heart of Buenos Aires.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

The most southern point you can drive to in the Western Hemisphere.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

The best place to send your postcards home from Antarctica.

This abandoned Antarctic base sits nearly unchanged since it was forsaken in the 1950s, just waiting for you to visit.

One of America's oldest Antarctic research bases is abandoned but still just waiting for visiting explorers.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

A beautiful red-faced slot canyon in northern New Mexico.

According to legend it was a nap taken under this tree that kicked off the California Gold Rush.

Oldest building in California still in use.

These lush groves of fan palms rise up like oases out of southern California's Colorado Desert.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The former headquarters of Mexico's Secretariat of Public Education now houses a muralism museum, including Diego Rivera's first large-scale mural project.

A spiritual vortex among the red rocks in Sedona.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

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

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.