No one knows who painted this mysterious mural in a Penn State basement.

This stone polylith serves as both a 100+ year old experiment and monument to the history of science.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

Explore a subterranean wonderland with Pennsylvania’s largest stalagmite.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

Themed gardens, a conservatory, and a rose named for Milton Hershey, all overlooking Hersheypark.

This mobile theater show highlights the story of Hershey through fun facts, unique stories, and plenty of candy samples.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Recorded as the first person buried in Arlington Cemetery.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Fans line up at the crack of dawn for a slurpy bowl of deliciousness at this noodle counter inside a factory.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

See the place where little league baseball was born.

Tour the row, actually a few blocks, where 19th century lumber barons built their grand homes.

This sculpture brings optical illusion to the roadway.

Let the dogs out at Central Pennsylvania's beloved wiener spot, where classic ketchup and mustard share space with innovative menu items like the Cubano Dog.

There’s something for everyone at this engaging emporium.