LOS ANGELES, UNITED STATES - From converted train cars to converted prisons, travel Web site VirtualTourist.com has come up with its picks of the 10 most unusual places to stay.

"With limited vacation time, there's no reason your lodging shouldn't be part of the travel experience," said VirtualTourist.com general manager Giampiero Ambrosi. This list was prepared by VirtualTourist and is not endorsed by Reuters:

1. Edisto River Treehouses - Canadys, South Carolina

For those who refuse to grow up, a stay in a tree house is a dream come true. Not only is it fun, but it's clean, safe, and very reasonable.

2. Celica Hostel - Ljubljana, Slovenia

If you've always wanted to spend a night in the slammer, now's your chance. Once a military prison, this happening hot spot is now an art gallery/youth hostel

3. Schottenstift Monastery - Vienna, Austria

If the bellboys look like monks, you're not imagining things. This hotel is actually a functioning monastery where your wake-up call might just be chanting.

4. The Red Caboose Motel - Strasburg, Pennsylvania

All aboard! Although they once traveled from city to city, these little red cabooses now function as private hotel rooms. Needless to say, kids go crazy for this place.

5. Propeller Island - Berlin, Germany

Art lovers rejoice! From upside-down rooms to levitating beds, it's the next best thing to spending the night in a museum.

6. Schlosshotel Schonburg - Oberwesel, Germany

For a true fantasy experience, nothing beats a night in a genuine castle. In spite of its long history, all modern amenities, including Internet service, are available to guests.

7. Ariau Amazon Towers - Near Manaus, Brazil

Connected by a series of catwalks, eight buildings comprise this compound, which has become a favorite of celebrities and everyday travelers alike.

8. Hotel Sidi Driss - Matmata, Tunisia

The force was with the cast and crew of Star Wars when they filmed at this out-of-this-world property. The amenities are minimal, but at less than $20 a night, so is the price.

The Euromast in Rotterdam, Netherlands, is seen in this handout photo taken June 2003.

9. Euromast - Rotterdam, The Netherlands

A tourist attraction by day, this imposing tower becomes an exclusive hotel at night. Those wishing to give it a go should book early; the tower's two suites fill up three months out.

Giraffe Manor, Nairobi, is seen in this handout photo taken October 2007.

10. The Giraffe Manor - Nairobi, Kenya

Don't bother with a "Do Not Disturb" sign. The long-necked visitors who peek in through the windows of this extraordinary compound will just ignore it.