This stone complex marks the urban center of a lost civilization.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

A mouldering Colombian bull ring stands as a reminder of the country's complicated relationship with a brutal sport.

This dramatic monument in Colombia honors a little-known indigenous fighter for independence.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.

A self-taught astronomer fell in love with the stars and built his own observatory in Colombia.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

The centuries-old trees are draped with Spanish moss to make them look like wizened elders.

This Bogotá museum houses the world's largest collection of pre-Columbian gold relics.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

Cathedral carved out of salt, located a mile below the earth's surface.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The trials and tribulations of marking Poe's grave.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Home to a vast and influential collection of Shakespeareana.

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

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.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Home to items never before seen by the public.