A mysterious "wedding cake" castle in the middle of the urban desert.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

For almost 100 years, this site of peace and spirituality has existed on the California coast.

This densely-packed cluster of buildings was saved from the wrecking ball and turned into an art community.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

The United States Capitol's former columns still stand.

A simple Colonial home with a past haunted by death and madness.

This sculpture forces visitors to confront their relationship with space.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A controversial memorial at the place where Captain Cook met his violent end.

A 60-room castle constructed by a horse-racing heir.

More than 300 years old, Kyoto's historic "teahouse" still operates as an invitation-only geisha club.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

This museum covers 10,000 years of Pre-Columbian Latin American history.

This statue was a gift to commemorate the Thai monarch's first visit to a foreign land.

A manifestation of modernist architectural ideas, this massive, multi-purpose building was one of the first of its kind in Southeast Asia.

A ring of soy sauce bottle bases decorate an important Singaporean landmark.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.