Pilgrims each carried a brick to the top of Mount Monserrate to help build this historic sanctuary in Colombia.

Colombia's biggest botanical garden contains plants from all across the country.

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

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

A celebration of the animation wizard's childhood home and antique railroad memorabilia collection.

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

This 40-foot fowl marks the so-called "wild goose capital of the world."

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A marvel of Byzantine engineering under the streets of Istanbul.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This metro station doubles as an unintentional paleontology museum.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This once-derelict building is now one of the most beautiful bookstores in the world.

A quiet spot commemorating two naturalists who had to choose between love and the university at which they both taught.

This small stone chapel is a hidden gem just outside the University of New Hampshire campus.

University of New Hampshire holds the documentation and artifacts of local alien abductees.