Nile river cruise boats at their moorings in Luxor. Not only is the variety of craft visible, but so is the cloud of the day's ac***ulated pollution from their exhaust fumes, hanging over the river in the late afternoon.

A typical Nile river cruise boat, most of which (in 2010) gave off an enormous amount of exhaust fumes from their stern, as seen here. At dusk a cloud of the day's ac***ulated pollution would hang over the river in the areas where the big boats moored, such as Luxor. This was the downside of a...

The most famous Nile river cruise boat of them all, the paddle steamer Sudan, which both inspired the novel and featured in the film "Death on the Nile".

The most famous Nile river cruise boat of them all, the paddle steamer Sudan, which both inspired the novel and featured in the film "Death on the Nile".

Nile river cruise boat, the Tosca.

Nile river cruise boat, the Nile Adventurer. A typical river cruiser hull, but with a yacht-like superstructure.

Oops! Not a good advert for Nile river cruises, left by the river bank for all to see!

Oops! Not a good advert for Nile river cruises, left by the river bank for all to see!

A Nile river cruise boat, the Aton.

A Nile river cruise boat, the Aton.

A Nile river cruise boat, the Reve du Nil.

Majestic Line's Glen Tarsan moored at the North Pier in Oban.