This remnant of an ancient Persian city is considered to be the world's largest single-span brick vault arch.

In this Brazilian city, a vertical graveyard rules the skyline.

This remnant of an old railroad is the tallest surviving wooden trestle bridge in Victoria.

The best-preserved example of a unique structure in Nubian architecture.

This impressive castle looms over small German town.

A former coastal watch post has been turned into a bothy with unrivaled views of the sea and its inhabitants.

This weird, elephant-shaped rock also hosts two ancient tombs.

One of the oldest lighthouses in the world has been in continuous use since it was first built in 1531.

Reaching this rock formation involves a hike through rocky rapids and springs where wild turtles reproduce.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

A cairn commemorating James Cook's second landing in Australia.

This urban park is home to monkeys and a number of endangered plants.

Train cars and railroad artifacts abound at this restaurant devoted to railway history.

An enormous Soviet aircraft, the only one of its kind, stands at the deserted shore of the Caspian Sea.

A fallen bull's legacy lives on in the rural cattle town that is named after him.

This historic hiding place, often used by people escaping slavery, is a testament to a heroic struggle for freedom.

The first motion picture theater in southern Utah, reimagined and renovated as an arts hub.

The world's oldest soul food restaurant is also one of its best.

It's beautiful, it's haunted and its claim to fame is that it's the oldest existing stone arch bridge in Australia.

The natural hot spring that was integral to the creation of Canada's first national park.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

This monument marking the center of Mexico might be more political than geographical.

This hole formed by a glacier is the largest and best-preserved of its kind in Stockholm.

Try the alligator at this fondue spot, which has been catering to "lovers and hedonists" since 1967.