This Old Testament garden features 100 plants from biblical times.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Eighteen miniature death-scene dioramas.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

A bit of retro transportation flair preserved in the world's largest department store.

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

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A historic neighborhood church is reborn as a psychedelic arts collective.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

People escaping slavery may have hidden inside a corpse vault.

This grand gothic brewery has been pumping out suds for over a hundred years.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

Two dozen pinball games hidden away inside a most unlikely location.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

Inside Crosswicks Creek Park resides an estate chronicling 200 years of history.

A recently abandoned psych ward at the end of Sanatorium Road.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The site of a tragedy in 1908 that claimed the lives of 171 people and changed fire safety laws across the state.