Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

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

Art in the form of a winding, man made crack in stone.

The remains of a ruined mansion memorialize the 1906 earthquake.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

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

The remains of a 12th-century chapter house in Golden Gate Park.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.

The southernmost outpost of the Russian Empire in colonial America.

This natural marble cave is one of only five national monuments in Oregon.

A chilling monument to Korean patriots who resisted the Japanese occupation.

Gold Rush-era tombstones line the park's paths.

A huge musical instrument played by the ocean.

This (occupied) house is 10 feet wide and full of spite.

The sole surviving relic of the San Francisco neighborhood cobbled together from old horsecars and streetcars.