This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

Large Hadron Collider and the Birthplace of World Wide Web.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A museum dedicated to "science, history and the arts" little changed since 1915.

Former abode of notable poet, complete with literary references and stories of ghosts.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

An enormous public square and parade ground built to celebrate Ghana's independence.

The best-preserved ancient theater in the world.

This arch granting triumphal entrance into Antalya was designed to honor the emperor's visit.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

A winery built on the site of a Gallo-Roman estate uses historical tools to recreate ancient vintages.

This historic stone gate tower is now just a lonely relic in the middle of a swamp.

The oldest Roman lighthouse still in use.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

Egyptian treasure trove of fossils documenting the whale's transition from land mammal to sea creature.

It might not be the prettiest pyramid in Egypt, but it may be the muddiest.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

Ancient Egyptian relief, claimed to depict an electrical light.

One of the most well-preserved temples of ancient Egypt.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.