Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

Millions of numbers carved in glass represent the tattoos forced upon victims.

The massive machine creates cracking displays of indoor lightning.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

This small shop walked so America could run on Dunkin'.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A curious building honoring past and current members of a historic musical comedy troupe.

If it feels like a speakeasy, that’s because it probably was one.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

This historic graveyard was partially paved over to create a streetcar line.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

This beloved marketplace mascot poops money and grants good luck.

The most accurate timepiece in the world.

Perhaps the most scandalous statue of America's first president.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

This statue of the "father of television" stands prominently in the United States Capitol.