Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This chimerical bridge/tunnel appears to dead end right into the sea.

38-story baroque tower reflecting Detroit's rise, fall, and possible rise again.

Detroit’s downtown castle is one of the oldest structures in the city.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district

Glass and concrete building designed by Albert Kahn.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A hidden world of exotic succulents and cacti.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The miraculous hydrant that saved the Mission District in 1906.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

The best place in the park to test out your throwing arm.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A quiet marker in memory of local men and women lost in WWI.

A monumental cross hides in the trees in Golden Gate Park.

The remains of a ruined mansion memorialize the 1906 earthquake.