San Francisco's newly reopened hands-on science museum.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

A phallic shrine to a princess goddess in Krabi, Thailand.

The final resting place of the Emperor of the United States and Protector of Mexico.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

Unrepaired walls from a 1920 anarchist bomb attack.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A winding path built in secret on the edge of the continent.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The decaying adobe remains of an old homestead are just off the beaten path in Joshua Tree National Park.

This abandoned boat was left in place thanks to its rotting beauty.