The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

A very classy 1920s-era bar right in Grand Central Station.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

The seamy, underground secrets of Portland's criminal past.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

A beautiful 62-acre Catholic shrine and botanical garden.

Hunting trophies decorate Oregon's most unique bar-restaurant.

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

A 140-year-old castle with underground caves hidden in San Francisco.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

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

Half of a house.

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

Visible below the waves are memorials to the city's Gold Rush dead.